How do I fix 08007045d denied on Windows? First check the exact code in the dialog. Windows normally displays 0x8007045D, which means an I/O-device read or write failed; it is not the same error as 0x80070005, the general “Access Denied” code. The repair depends on whether the failing device is the source drive, destination drive, USB connection, SD card, optical disc or Windows installation media.
Stop repeated retries if the drive is making unusual noises or files are becoming inaccessible. Preserve readable data first, then isolate the connection and storage devices before running disk checks.
As an Amazon Associate I earn from qualifying purchases.
Check which Windows error you actually have
0x8007045D: an I/O-device error
0x8007045D is Windows error ERROR_IO_DEVICE. Microsoft’s wording is: “The request could not be performed because of an I/O device error.” Windows issued a read or write request and could not complete it reliably. The code does not identify one particular part; the source drive, destination drive, cable, USB port, adapter, card reader, SD card, optical disc or installation media may be responsible.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
The error can appear while copying files, creating a backup, installing Windows, burning or reading a disc, or opening files on USB and SD storage. Microsoft Q&A cases have described transfers between internal and external drives and photo or video reads from an SD card or reader.
#1 Best Overall
- USB-C 2-in-1 storage OTG: The Lexar JumpDrive Dual Drive D40E features USB Type-A and Type-C connectors in a slim, portable form factor for easy device compatibility
- Transfer speeds up to 100MB/s: Based on internal testing, performance may vary depending upon the host device, interface, and usage conditions. 1MB=1,000,000 bytes
- Plug and Play: Widely compatible with USB Type-C smartphones, tablets, laptops, Macs, and traditional Type-A devices, no software installation required. The 360° swivel design allows for easy switching between connectors without the hassle of losing a cap
- Durable & Compact: The Lexar D40E USB memory stick features a metal enclosure, withstands temperatures from 0° to 50° C (32°F to 122°F), and is lightweight at 26g with dimensions of 70.4 x 16.9 x 11.7mm
- Security & Warranty: Securely protects files using an advanced security software solution with 256-bit AES encryption. Backed by a Lexar 3-year limited warranty
0x80070005: a separate Access Denied error
0x80070005 is E_ACCESSDENIED. It generally means that the account, service or security policy lacks permission. It is not evidence of a failed cable or bad sector, so use the separate procedure near the end of this guide rather than treating it as an I/O fault.
| Code shown | What Windows is reporting | First area to investigate |
|---|---|---|
0x8007045D |
A read/write request to an I/O device failed | Drives, removable media, cables, ports, readers, adapters and installer media |
0x80070005 |
Access is denied because of permissions, services or policy | Folder and registry permissions, Windows servicing and security software |
Protect files before troubleshooting
A failing disk can deteriorate while Windows repeatedly retries reads or writes. If the affected volume contains unique photos, save games, documents or other irreplaceable data, copy the most important files to a separate, known-good disk before repair attempts.
- Stop if you hear repeated clicking, grinding, spin-up and spin-down cycles, or other unusual mechanical noises.
- Do not format, initialize or “repair” a disk that contains the only copy of important files.
- Use small, noncritical files for initial tests. A successful test copy does not prove that every sector is healthy.
- If files are unreadable and the data matters, minimize power-on time and consult a professional recovery service. Repeated scans and writes can reduce the chance of recovery.
Identify the fault domain
Write down the operation that failed and both sides of it. For example, record “copying from an SD card to the internal SSD” or “Windows setup reading a USB installer.” This tells you which component to test first.
| Where the error occurs | Likely areas to isolate | Lowest-risk first test |
|---|---|---|
| Copy from one disk to another | Source disk, destination disk, cable, USB port or enclosure | Copy a small, noncritical file to a different destination and swap the cable or port |
| Backup to an external drive | External drive, enclosure power, USB cable or destination file system | Try another known-good destination drive and another USB path |
| Read from USB or SD media | Media, card reader, adapter, port or media file system | Test the card and reader separately on another computer |
| Windows installation | Bootable USB/DVD, ISO download, optical drive or target disk | Recreate the installer on fresh media, then retry |
| Disc burning or reading | Disc surface, burner/reader, drive firmware, media or the source file | Try a different disc and a different drive; avoid reusing visibly damaged media |
Step-by-step fixes for 0x8007045D
1. Record the exact message and timing
- Capture the complete dialog, including the hexadecimal code and the file or drive named.
- Note whether the failure happens immediately or after a particular percentage of a copy or installation.
- Record the drive letters, USB devices, adapters and software involved.
An error that always stops at the same file or percentage can point to one unreadable source area. An error that moves around after reconnecting can point to the connection path or a device that is losing contact.
Rank #2
- High-speed USB 3.0 performance of up to 150MB/s(1) [(1) Write to drive up to 15x faster than standard USB 2.0 drives (4MB/s); varies by drive capacity. Up to 150MB/s read speed. USB 3.0 port required. Based on internal testing; performance may be lower depending on host device, usage conditions, and other factors; 1MB=1,000,000 bytes]
- Transfer a full-length movie in less than 30 seconds(2) [(2) Based on 1.2GB MPEG-4 video transfer with USB 3.0 host device. Results may vary based on host device, file attributes and other factors]
- Transfer to drive up to 15 times faster than standard USB 2.0 drives(1)
- Sleek, durable metal casing
- Easy-to-use password protection for your private files(3) [(3)Password protection uses 128-bit AES encryption and is supported by Windows 7, Windows 8, Windows 10, and Mac OS X v10.9 plus; Software download required for Mac, visit the SanDisk SecureAccess support page]
2. Shut down safely and reseat the connection
- Cancel the operation and eject removable storage through File Explorer when Windows allows it.
- Power off an external hard drive or SSD if its enclosure has a switch; then disconnect it.
- Reconnect directly to the computer, not through an unpowered hub or dock.
- Try a different USB port. On a desktop, a rear motherboard port can provide a more direct connection than a front-panel extension.
- Replace the USB data cable with a known-good cable of the correct type. A cable that powers a device can still have unreliable data lines.
- For an SD card, test the card in another reader and test the reader with another card. For a removable drive, test it on another computer.
These swaps are diagnostic: if the same disk works through a different cable or reader, replace the failed connection component rather than repeatedly repairing the disk.
3. Test source and destination independently
- If the source is removable, copy one small, noncritical file to the computer’s internal drive.
- If that works, copy a different small file to a second destination. A failure only with one destination points toward that destination or its connection.
- If the source read fails on multiple computers and readers, stop large copy attempts. The source media may be failing.
- If the source reads correctly but every destination fails, test a different destination disk and cable.
Do not use a failing source as the destination for a “backup.” A backup is useful only when it is written to storage that can be read back reliably.
4. Try another destination or replacement test drive
When a copy or backup fails, a known-good external USB hard drive or SSD is a practical test destination. It can show whether the original destination is the problem, and it can serve as a replacement if that destination has failed. Buying another drive cannot repair a failing source disk or restore files that are already corrupted.
Use a different USB data cable or card reader when changing the connection path is easier than changing the storage device. Keep the test simple: one device, one cable, one direct port and one small file at a time.
Rank #3
- What You Get - 2 pack 64GB genuine USB 2.0 flash drives, 12-month warranty and lifetime friendly customer service
- Great for All Ages and Purposes – the thumb drives are suitable for storing digital data for school, business or daily usage. Apply to data storage of music, photos, movies and other files
- Easy to Use - Plug and play USB memory stick, no need to install any software. Support Windows 7 / 8 / 10 / Vista / XP / Unix / 2000 / ME / NT Linux and Mac OS, compatible with USB 2.0 and 1.1 ports
- Convenient Design - 360°metal swivel cap with matt surface and ring designed zip drive can protect USB connector, avoid to leave your fingerprint and easily attach to your key chain to avoid from losing and for easy carrying
- Brand Yourself - Brand the flash drive with your company's name and provide company's overview, policies, etc. to the newly joined employees or your customers
5. Recreate Windows installation media
If the code appears while reinstalling Windows, the bootable USB or DVD may be corrupt or incorrectly created. Microsoft Q&A guidance has identified faulty installation media as a possible cause.
- Obtain a fresh Windows installation image from Microsoft’s official download process.
- Use a different, good-quality USB flash drive if the existing installer has been used repeatedly or has shown read errors.
- Recreate the bootable media rather than copying files manually onto the old installer.
- Boot from the newly created media and retry the installation.
- If setup still fails, test the target disk and its storage connection; recreating media cannot fix a bad target drive.
6. Check the disk after data protection
Once important files are protected, Windows can check the file system with CHKDSK. Replace X: below with the affected volume’s letter:
- Open Windows Terminal (Admin) or Command Prompt (Admin).
- Run
chkdsk X: /scanfor an online scan when the volume supports it. - If Windows reports file-system errors and your data is backed up, schedule a repair with
chkdsk X: /f. Windows may ask to run it after restart. - Use
chkdsk X: /ronly when you understand that a full bad-sector scan can take a long time and places additional read workload on a troubled disk.
CHKDSK can identify file-system problems and bad sectors; it cannot make physically damaged media reliable. If it reports bad sectors, unreadable clusters or recurring I/O errors, plan to replace the disk or seek recovery help instead of repeating repairs.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →7. Run the manufacturer’s diagnostic when available
Many drive manufacturers provide a diagnostic utility for their own hardware. Use the vendor’s documentation for the exact test and preserve data first. A result indicating hardware failure is a replacement or recovery decision, not a reason to keep testing indefinitely. If the drive is in an external enclosure, test the enclosure, cable and drive separately when the design allows it.
Rank #4
- GOOD VALUE PACKAGE - 1 Pack 32GB Memory Stick USB 2.0 Flash Drives with great cost performance and high quality.
- BIG CAPACITY - The available capacity: 29.10GB-29.8GB, You can save the data of movies, music, photos, designs, programs, manuals, handouts in a high speed.Good performance in digital data storing, transferring and sharing with families, friends, workmates, clients and machines.
- EASY TO USE & PLUG AND WORK - Support windows 7 / 8 / 10 / Vista / XP / 2000 / ME / NT Linux and Mac OS, Compatible with USB2.0 and below.
- TWISTTURN DESIGN & EASY CARRY - The metal clip rotates 360° round the ABS plastic body which with rubber oil skin feeling finish. The capless design can avoid lossing of cap, and providing efficient protection to the USB port.
- WARRANTY & SUPPORT - SIMMAX logo is laser printed on the USB connector surface, our products are of good quality and we promise that any problem about the product within one year since you buy.
Fixes by the situation in which the error appears
Copying files between internal and external drives
Start by identifying whether the failure occurs while reading the source or writing the destination. Copy a small file from the same source to the internal drive, then from the internal drive to another destination. If only one direction fails, concentrate on that side. If the failure follows the external enclosure across computers, the enclosure or drive is suspect; if it disappears with a new cable or port, the connection was the fault domain.
Backups
Pause the backup job rather than letting it retry endlessly. Check whether the same files fail every time. Preserve accessible files manually to a separate disk, then test the destination with a small copy. A backup that completes after silently skipping unreadable files is not a complete backup, so review the backup program’s log for skipped or failed items.
USB flash drives and SD cards
Test the media in another reader or computer before formatting it. If only one reader fails, replace the reader. If the card fails everywhere, copy whatever remains readable and retire the card. Formatting may make a device appear usable by creating a new file system, but it destroys directory information and does not cure worn or damaged flash memory.
Optical discs
Inspect the disc for scratches, contamination or warping and clean it according to the drive or disc maker’s instructions. Test another disc in the same drive and the suspect disc in another compatible drive. If only one disc fails, the media is likely at fault; if many known-good discs fail, investigate the optical drive or its connection.
Best Value
- 【16GB Flash Drive】USB flash drives with 16GB capacity, meet your needs of daily use on work, school, home and travelling for photos, music, videos, files storage and transfer. IMEASON thumb drives can be used to store different files, easy to data backup.
- 【Metal Swivel Cap Design】USB thumb drive is metal swivel cover provides extra protection for the usb thumbdrive connector, no usb drive cap to lose; keychain design makes it easier to carry without worrying lose it.
- 【Wide Compatibility】USB drive supports Windows 7/8/10/11 / Vista / XP / Unix / 2000 / ME / NT Linux and Mac OS, also Supports USB 2.0 and 1.1 ports. USB Stick support TV, desktop, notebook computer, car, audio and other device. The USB Memory Stick is your great data storage and transfer companion with traveling and working.
- 【Easy to use】usb memory stick is plug and play without any software installation. Just simply plug the Flashdrive into the port of your USB-compatible devices such as computer, laptop to start data storage or transmission.
- 【What You Get】16 GB USB Flash Drive Thumb Drive, The default format of the usb storage flash drive is FAT32.
Windows installation or upgrade
Recreate the bootable media first. If the new installer fails at the same point, disconnect unnecessary USB devices, verify that the target drive is firmly connected, and test that drive from another environment. Do not erase partitions until you have confirmed that required data is backed up.
How to interpret the result
| Observation | Most useful next action |
|---|---|
| A different cable or port makes the device reliable | Replace the cable or avoid the failing port; continue monitoring the storage device |
| The device works on another computer | Investigate the original computer’s port, adapter, hub, enclosure power or operating-system configuration |
| The same device fails on several computers and connection paths | Copy readable data immediately, then replace the device or seek professional recovery |
| Only one destination fails | Use another destination and test or replace the original destination drive |
| CHKDSK reports bad sectors or errors return | Treat the disk as unreliable; replacement is safer than continued normal use |
| A fresh installer works | Discard the old installation media and keep the new media as the verified installer |
What to do when the code is really 0x80070005
Do not apply the I/O-device workflow to an Access Denied message. Microsoft documents 0x80070005 as E_ACCESSDENIED, a general permissions error.
- Confirm the exact path, application and operation that was denied.
- For Windows Update or servicing failures, review the Windows Update and CBS logs for the component and account named in the failure.
- Check permissions on the affected folder, file or registry key. Verify that the required account or service has the access it needs.
- Pay particular attention to TrustedInstaller and SYSTEM permissions when the failure involves Windows components.
- Check whether security software, controlled-folder access or an organizational policy is blocking the operation. Change a policy only when you administer the computer and understand the security impact.
- Restore any temporary permission change after the task, and avoid taking ownership of system folders as a blanket fix.
If the dialog contains both an access-denied message and a separate I/O error, record both. A permission problem can prevent an operation from starting, while a device problem can make it fail after it has begun; they require different remedies.
Free tools Windows power users keep installed
One-click scans. No signup required.
When replacement or professional recovery is the right choice
Replacement is appropriate when a disk repeatedly reports bad sectors, disappears, produces I/O errors on multiple computers or cannot complete basic reads and writes. Professional recovery is the safer option when the device contains unique data that is not readable elsewhere. Keep the failing device powered off until you decide; do not format it or run increasingly intensive scans merely to see whether it improves.
“Error 0x8007045d is ‘ERROR_IO_DEVICE’ – ‘The request could not be performed because of an I/O device error.’” — Diana, Microsoft Answers Support Engineer, 2010.
There is no established universal success rate for these fixes. The code identifies a failed I/O request, not a single repairable defect, so the outcome depends on which component is failing and whether the data remains readable.
Quick Recap
If you prefer an automated shortcut after trying the manual checks, Outbyte PC Repair can look for common Windows problems, adjust system settings, clean temporary and cache files, check selected vulnerabilities and record app crashes. It complements antivirus software rather than replacing it; results vary and no tool repairs every crash. It runs on Windows 11, 10, 8 and 7 and offers a free trial by category for at least two days before a subscription.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
