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Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →dafbth.dll is a genuine Microsoft Windows system file, not a game or Visual C++ runtime file. If Windows says dafbth.dll is missing, was not found, corrupted, or could not be loaded, repair Windows and the Bluetooth device-association path instead of downloading a replacement DLL.
What dafbth.dll is
dafbth.dll is the Bluetooth Device Association Framework Provider, a Windows component involved in associating Bluetooth hardware and paired devices. It is normally located at:
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C:WindowsSystem32dafBth.dll
On 64-bit Windows, System32 contains 64-bit system binaries. SysWOW64 is associated with 32-bit system binaries. Do not copy a DLL between these folders simply because an error message names the file.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallA public inventory lists a 64-bit Windows 10 build as version 10.0.10586.212, approximately 0.16 MB. That is an older documented listing, not a universal version requirement for Windows 10 or Windows 11. Current files can have different versions.
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- Bluetooth 5.4 + Broad Compatibility - Provides Bluetooth 5.4 plus EDR technology and is backward compatible with Bluetooth V5.3/5.0/4.2/4.0/3.0/2.1/2.0/1.1.
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- Plug & Play with Free Driver Support - Plug and play for Windows 8.1/10/11 (internet required). Supports Win7 (driver required and can be downloaded from website for free). Download the latest driver from TP-Link website to utilize Bluetooth 5.4
| Check | Expected result |
|---|---|
| File name | dafBth.dll |
| Windows location | %windir%System32 |
| Component | Bluetooth Device Association Framework Provider |
| Operating-system role | Windows Bluetooth and device association |
| Usual repair | DISM, SFC, Windows Update, and Bluetooth-driver repair |
The filename alone does not prove that a file is legitimate. Its full path, digital signature, architecture, and surrounding Windows symptoms matter.
What the error usually means
You may see messages such as:
- “dafBth.dll was not found”
- “dafBth.dll is missing”
- “dafBth.dll could not be loaded”
- “dafBth.dll is corrupted”
- “The procedure entry point could not be located in dafbth.dll”
The exact wording helps narrow the problem:
- Missing or not found: the file may have been deleted, quarantined, or become inaccessible.
- Corrupted: Windows may have damaged system files or its component store.
- Could not be loaded: the file may be the wrong version or architecture, or another Windows dependency may be damaged.
- Entry point not found: a manually copied DLL may not match the Windows build.
- One application only: the application may be reporting a broader Windows or Bluetooth failure. It does not prove that the application owns the DLL.
Consider what happened immediately before the error. Useful clues include a Windows update, Bluetooth-driver update, cleanup utility, antivirus detection, failed repair, disk problem, or malware incident. Also check whether Bluetooth, a headset, printer, scanner, controller, or another paired device stopped working at the same time.
First, verify the file safely
Before repairing or removing anything, check whether the expected file exists.
- Press Windows key + E to open File Explorer.
- Select the address bar.
- Enter:
%windir%System32
- Search for
dafBth.dll. - Right-click the file and select Properties.
- Check the Digital Signatures tab if it is present.
- Select the signature, choose Details, and confirm that Windows reports a valid signature and Microsoft as the signer.
You can also check the signature from an elevated PowerShell window:
- Right-click Start.
- Select Terminal (Admin) or Windows PowerShell (Admin).
- Run:
Get-AuthenticodeSignature "$env:windirSystem32dafBth.dll"
A valid Microsoft signature in the expected Windows directory is reassuring. A copy in a Downloads folder, application directory, temporary folder, or removable drive should not be trusted merely because the name matches.
Do not delete a file from System32 manually. Let Windows repair it.
Rank #2
- INSTANT BLUETOOTH ACCESS: Bluetooth dongle adapter receiver for PCs converts non-Bluetooth devices into Bluetooth-capable with simple USB connection
- WIDE COMPATIBILITY: Supports Bluetooth 5.4 and is backwards compatible with Bluetooth 5.3/5.2/5.1/5.0/V4.2/4.0/3.0/2.1/2.0/1.1; ONLY works with Windows 8.1, 10, and 11
- MULTI-DEVICE CONNECTION: Connect up to 6 devices simultaneously; Not compatible with all other operation systems e.g. Mac, Linux, Chrome, Unix, Playstation(PS), Windows 7 and below; Nano bluetooth receiver can be plugged in via any standard USB port
- ENHANCED PERFORMANCE: EDR and BLE technology offers enhanced data rate/transfer speed and low energy consumption
- SYSTEM REQUIREMENTS: Not compatible with all other operation systems e.g. Mac, Linux, Chrome, Unix, Playstation(PS), Windows 7 and below; Disable any built-in Bluetooth of the device before use this product, refer to the user manual for detail
Fix 1: Repair Windows with DISM and SFC
This is the safest first repair when the file is absent, damaged, unsigned, or accompanied by other Windows failures. Microsoft documents DISM for repairing the Windows component store and SFC for repairing protected system files.
- Right-click Start.
- Select Terminal (Admin), Windows PowerShell (Admin), or Command Prompt (Admin).
- Run this command and wait for it to finish:
DISM.exe /Online /Cleanup-Image /RestoreHealth
- When DISM completes, run:
sfc /scannow
- Wait until SFC reaches 100 percent.
- Restart Windows.
- Check Settings > Windows Update and install pending updates.
- Test Bluetooth and the application that showed the error.
Do not close the window while either scan is running. DISM may use Windows Update as its repair source, so an internet connection can help.
Typical SFC results include:
- Windows Resource Protection did not find any integrity violations: no protected-file corruption was found.
- Windows Resource Protection found corrupt files and successfully repaired them: restart and test again.
- Windows Resource Protection found corrupt files but was unable to fix some of them: continue with the CBS log and recovery steps below.
If the manual DISM and SFC sequence leaves you guessing which repair changed the system, Outbyte PC Repair can show what its free scan finds; repairs are performed by the full version, but it is optional and not required for this Windows fix.
If SFC identifies a problem with this exact file and you have confirmed its path, run a targeted scan:
sfc /scanfile=C:WindowsSystem32dafBth.dll
Restart after it completes and test again.
If SFC cannot repair the file, review:
%windir%LogsCBSCBS.log
If DISM reports that source files cannot be found, use a matching Windows installation source. The source must correspond to the same Windows version and edition. Do not substitute a random DLL from another computer.
Fix 2: Install Windows updates
A failed, incomplete, or rolled-back update can leave protected components inconsistent.
Windows 11
- Open Start > Settings.
- Select Windows Update.
- Select Check for updates.
- Install every applicable update.
- Restart when asked.
- Return to Windows Update and check again.
Windows 10
- Open Start > Settings.
- Select Update & Security.
- Select Windows Update.
- Choose Check for updates.
- Install the available updates.
- Restart and test Bluetooth.
If Windows Update itself is damaged, run DISM followed by SFC again, restart, and retry Windows Update.
Rank #3
- Upgraded Bluetooth 5.3 Adapter: This bluetooth adapter for pc uses the latest upgraded Bluetooth 5.3 BR+EDR technology, greatly improves the stability of the connection data transfer speed, reduces the possibility of signal interruption and power consumption.
- Up to 5 Devices Sync Connected: UGREEN Bluetooth dongle for PC supports up to 5 different types of Bluetooth devices to be connected at the same time without interfering with each other, such as Bluetooth mouse/keyboard/mobile phone/headphones, etc. If Bluetooth audio devices of the same type (such as speakers/headphones) are connected, only one device can play music.
- Plug and Play: The Bluetooth adapter is developed for Windows systems only and does not support other systems. No driver installation is required under Windows 11/10/8.1. NOTE: Win 7, Linux and MacOS System are NOT supported.
- Mini Size: An extremely compact Bluetooth stick that you can leave on your laptop or PC without removing it.The compact size does not interfere with other USB ports. Convenient to carry, no space occupation.
- What Can I do if the Bluetooth adapter can not work?: Ensure there are no other Bluetooth devices installed on the computer. If there are, disable all existing Bluetooth devices in "Device Manager", then insert the adapter and try again. (For detailed information please read the user manual)
On supported Windows 11 systems, another repair option is:
- Open Start > Settings > System > Recovery.
- Find Fix problems using Windows Update.
- Select Reinstall now.
- Follow the prompts.
This reinstalls the current Windows version while preserving apps, files, and settings. Keep a backup before major recovery work.
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Fix 3: Update or reinstall the Bluetooth driver
If Bluetooth disappeared, stopped pairing, or devices began failing at the same time as the DLL error, the adapter driver may be the practical cause.
- Right-click Start.
- Select Device Manager.
- Expand Bluetooth.
- Right-click the Bluetooth adapter, usually identified as a radio.
- Select Update driver.
- Choose Search automatically for drivers.
- Restart Windows.
- Test the affected device.
If the problem remains:
- Return to Device Manager > Bluetooth.
- Right-click the Bluetooth adapter.
- Select Uninstall device.
- Confirm the uninstall.
- Restart Windows.
Windows may reinstall the adapter automatically. If it does not, obtain the driver from the computer manufacturer’s official support page for the exact model and Windows version. Avoid a driver intended for a different architecture or device revision.
When checking several devices manually, it is easy to guess which driver is stale or repeat installs without knowing what changed. Outbyte Driver Updater can show what its free scan identifies; driver installation is handled by the full version, and it remains optional.
After the driver repair, pair the device again:
- Open Settings.
- Select Bluetooth & devices on Windows 11, or Devices on Windows 10.
- Remove the failed device if it remains listed.
- Turn Bluetooth off and on.
- Select Add device and pair it again.
Fix 4: Check antivirus quarantine
Security software may quarantine a system file after a false positive, but restoring a quarantined file without verification is unsafe.
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One-click scans. No signup required.
For Microsoft Defender:
- Open Windows Security.
- Select Virus & threat protection.
- Select Protection history.
- Review detections involving
dafBth.dll. - Expand the detection and check its path.
- Restore it only if the path is the expected Windows system location, the file is verified as Microsoft-signed, and you are confident the detection is false.
- Run a full scan afterward.
If the file was located outside %windir%System32, do not restore it merely because its filename matches. If malware is possible, disconnect sensitive systems from the network as appropriate, run a full scan, and continue with Windows recovery rather than copying a replacement file.
Rank #4
- This Bluetooth adapter for PC utilizes the latest Bluetooth 6.0 EDR technology, delivering faster data transfer speeds, seamless high-quality audio/video streaming, and efficient large-file transfers.
- Up to 5 Devices Sync Connected: This Bluetooth dongle for PC supports up to 5 different types of Bluetooth devices to be connected at the same time without interfering with each other, such as Bluetooth mouse/keyboard/mobile phone/headphones, etc. Note: If Bluetooth audio devices of the same type (such as speakers/headphones) are connected, only one device can play music.
- Ultra-High Data Transfer Speeds: With Bluetooth 6.0 technology, this bluetooth dongle will bring us a faster speed experience. And Bluetooth 6.0 is backward compatible with Bluetooth5.4/5.3.
- EDR and BLE Technology - This Bluetooth dongle is equipped with enhanced data rate and Bluetooth low energy, it wil optimize energy.
- Plug and Play: The Bluetooth receiver is developed for Windows systems only and does not support other systems. No driver installation is required under Windows 11/10/8.1. NOTE: Linux and MacOS , Win 7 System are NOT supported.
Fix 5: Use recovery when repairs still fail
If DISM, SFC, updates, and the Bluetooth driver do not resolve the problem, the cause may include disk corruption, cleanup damage, malware, or broader Windows instability.
Consider System Restore if a restore point exists:
- Press the Windows key.
- Search for Create a restore point.
- Open it.
- Select System Restore.
- Choose a restore point from before the error began.
- Follow the wizard and restart.
System Restore normally rolls back system files, drivers, and settings without removing personal files, but review the affected programs shown by the wizard.
If Windows remains damaged, use the Windows recovery options for an in-place repair or reset. Back up important files first. Before escalating, record:
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
- The exact error text
- Your Windows version and architecture
- The file’s full path
- The digital-signature result
- The final DISM and SFC messages
- Relevant entries from
CBS.log - Whether Bluetooth hardware also failed
- Any recent update, driver, antivirus, or cleanup event
What not to do
Do not download a replacement DLL
Random DLL download websites can provide malware, the wrong Windows version, the wrong architecture, or a file with a misleading signature. A copied DLL may silence one message while causing an entry-point, dependency, or loading error later.
There is no identified official standalone Microsoft dafbth.dll redistributable. The safe source is Windows itself, repaired through DISM, SFC, Windows Update, or Windows recovery.
Do not run regsvr32 dafbth.dll
regsvr32 is intended for DLLs that expose a registration entry point such as DllRegisterServer. Public metadata for dafBth.dll lists DllGetClassObject and DllCanUnloadNow, not DllRegisterServer. Running:
Best Value
- Bluetooth 5.4 dongle: Applies the latest Bluetooth 5.4+EDR technology, compatible with Bluetooth 5.3/5.2/4.2/4.2 LE/4.0/2.1+EDR, and supports Dual mode (BR/EDR+ Bluetooth Low Energy) to achieve low energy consumption and high speed. Quick response and better anti-interference.
- Plug & Play: USB wireless Bluetooth is not limited by network and location, no need to install drivers, just plug the USB wireless adapter into your computer, you can use it directly. You can use the Bluetooth function at any time. Greatly improve your work efficiency and save your time.
- Long Range Bluetooth Adapter: The USB Bluetooth 5.4 dongle uses Class 1 radio technology, equipped with extra long antenna, and the transmission range in the open area can reach 500ft/150m, Bluetooth connections are no longer affected by distance. Note: The actual transmission range will be affected by physical obstructions and wireless interference.
- Fast Transmission Rate: This upgraded Bluetooth 5.4 adapter features EDR technology and Bluetooth Low Energy (BLE) configuration up to 3Mbps, which greatly improves transmission rates and reduces the loss of transmission efficiency due to interference in the 2.4GHz band. Enables fast, no delay wireless data connections between your computer and Bluetooth devices.
- System Support: The upgraded Bluetooth 5.4 dongle has a wide range of applications. You can connect up to 5 devices at the same time using Bluetooth wireless. Such as Bluetooth speakers,keyboards,headsets,mice, and Bluetooth printers,etc. Only supports Windows 11/10/8.1, Not compatible with Mac OS, Linux,car stereo systems,XBOX,ps4 or TVs.
regsvr32 dafbth.dll
is therefore not a normal repair and may produce an entry-point error.
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteDo not reinstall unrelated runtimes
There is no verified evidence that Visual C++ Redistributable, DirectX, or .NET installation repairs this Windows Bluetooth provider. Windows Features are also not the normal repair path for this file. Use those components only when a separate application has a documented dependency.
FAQ
Is dafbth.dll legitimate?
Yes, when it is the Microsoft Windows file in the expected Windows system directory and has a valid Microsoft signature. A matching filename elsewhere is not enough.
Is dafbth.dll part of Windows?
Yes. It is associated with the Windows Bluetooth Device Association Framework Provider.
Should I copy it into an application folder?
No. Copying a system DLL into an application directory can create version and architecture conflicts. Repair Windows instead.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Is the file 32-bit or 64-bit?
Public listings include a documented 64-bit version, while legacy inventories may show other architectures. Do not rely on an inventory to choose a replacement. Match the installed Windows component through Windows repair.
Why does a game or application show the error?
The application may be exposing a Windows component failure rather than shipping the DLL itself. If the message appears only in one program, update or repair that program after Windows and Bluetooth checks, but do not assume the program owns dafbth.dll.
Will reinstalling Visual C++ fix it?
Not normally. dafbth.dll is a Windows Bluetooth component, not a Visual C++ runtime file.
What is the correct order?
Verify the path and signature, run DISM and SFC, install Windows updates, update or reinstall the Bluetooth driver, check antivirus quarantine, and then use System Restore or Windows recovery if necessary.
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