What windows.devices.smartcards.dll is
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
windows.devices.smartcards.dll is a genuine Microsoft Windows component. It supports the Windows Runtime Windows.Devices.SmartCards API, which applications use to work with smart cards, smart-card readers, NFC-related functions, and TPM virtual smart cards.
The file is supplied through Windows servicing and protected system locations, not as a normal third-party application download. The safest repair is therefore to repair Windows itself rather than downloading a replacement DLL.
Microsoft documents the API in the Windows.Devices.SmartCards namespace, including the SmartCard, SmartCardReader, and provisioning APIs.
Known file versions
File details vary with the Windows release, architecture, language, and servicing level. These are known records, not universal values for every current installation.
#1 Best Overall
- Fully Compliant - Complies With All Major Industry Standards, Including Iso/Iec 7816, Usb Ccid, Pc/Sc, And Microsoft Whql. As Well As, Emv 2011 Ver 4.3 Level 1 And Gsa Fips 201.
- Seamless Integration - With Identiv-Specific Smartos You’Ll Get Easy, Complete Support Of All Major Contact Smart Card Ics And Technologies In One Simple Reader.
- Universal Compatibility - Works With Virtually All Contact Chip Cards And Pc Operating Systems, Including Windows, Macos, Linux And Android.
- Fast And Convenient- Shorten Your Transaction Time With A Reader That’S Optimized For Speed. It’S Ultra-Compact And Robust Design Is Streamlined For Mobile Operation, Making This Reader The Best Choice For Convenience, Security And Reliability.
- Ergonomic and cost efficient design
| Architecture | Known version | Approximate size |
|---|---|---|
| 64-bit | 10.0.14393.0 | 0.87 MB |
| 32-bit | 10.0.10586.494 | 0.53 MB |
| 64-bit | 10.0.10586.494 | 0.85 MB |
| 32-bit | 6.3.9600.16384 | 0.59 MB |
On 64-bit Windows, the 64-bit component is normally associated with C:WindowsSystem32. The 32-bit component is associated with C:WindowsSysWOW64. Do not use those folder names as a reason to copy in a downloaded file.
Microsoft records show the component in Windows 8.1 and later Windows versions. The current SmartCard API requirements focus on Windows 10 and later API contracts, so an application built for a newer Windows API may not work correctly on an older release.
Error messages you may see
Windows or an application may report:
- “The program can’t start because windows.devices.smartcards.dll is missing from your computer.”
- “The code execution cannot proceed because windows.devices.smartcards.dll was not found.”
- “There was a problem starting windows.devices.smartcards.dll.”
- “Error loading windows.devices.smartcards.dll. The specified module could not be found.”
- “windows.devices.smartcards.dll is either not designed to run on Windows or it contains an error.”
The wording depends on the Windows version and the program making the request. “The specified module could not be found” can also mean that a dependency of the named DLL is missing, not necessarily that the DLL itself has disappeared.
Fix windows.devices.smartcards.dll errors safely
Work through these fixes in order. Restart and test the affected program after the main repair steps.
Recommended Free Tools
1. Install Windows updates and restart
A failed or incomplete update can leave Windows components out of sync.
- Press Windows + I to open Settings.
- Select Windows Update.
- On Windows 11, select Check for updates. On Windows 10, select Check for updates under Update & Security > Windows Update.
- Install all available updates.
- Restart the computer, even if Windows does not immediately require it.
- Start the program again.
If the error began directly after an update, open Windows Update > Update history and note the recent installation. If the problem continues, use the Microsoft guidance for uninstalling a Windows update, or continue with the repair commands below.
2. Repair Windows with DISM and SFC
This is the most important fix when the file is missing from Windows, corrupted, or rejected as “not designed to run on Windows.”
- Open Start.
- Type
Command Prompt. - Right-click Command Prompt and select Run as administrator.
- Select Yes if User Account Control appears.
- Run this command:
DISM.exe /Online /Cleanup-Image /RestoreHealth
- Wait for DISM to finish. It can remain at one percentage for some time.
- When the command completes, run:
sfc /scannow
- Wait until the verification reaches 100 percent.
- Restart Windows and test the affected application.
DISM repairs the Windows image and provides source files that SFC may need. SFC then checks protected system files and replaces damaged copies. Microsoft provides the full procedure in its guide to repairing missing or corrupted system files.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsRank #2
- Advanced Realtek Chipset; PIV, EMS, ISO-7816 & EMV2 2000 Level 1, CE, FCC, VCCI and Microsoft WHQL certifications.
- Supports ActivClient, AKO, OWA, DKO, JKO, NKO, BOL, GKO, Marinenet, AF Portal, Pure Edge Viewer, ApproveIt, DCO, DTS, LPS, Disa Enterprise Email and etc. CAC chip cards
- Sleek ergonomic flat design, precise slot, convenient to horizontally plug card
- Compatible with Windows10/11, Mac OS 10.15 or later. Driver free, plug and play.
- New generation DOD Military CAC USB smart chip card reader, no firmware upgrade requirements
If SFC reports that it found and repaired corrupted files, restart and test again. If it says that some files could not be repaired, do not download an isolated DLL. Repeat DISM after installing pending updates, then run SFC again.
Outbyte PC Repair can reduce the manual guesswork of repeatedly running SFC and DISM by showing what it identifies during its scan; repairs are performed by the full version, and it is optional because Microsoft’s built-in commands remain the primary fix.
3. Use a matching DISM repair source if DISM fails
DISM may fail when Windows Update cannot provide the required component files. Microsoft supports using a Windows installation source that matches the installed edition, language, and architecture.
After preparing a matching repair source, run the command with its actual path. For example:
Free tools Windows power users keep installed
One-click scans. No signup required.
DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:RepairSourceWindows /LimitAccess
Replace C:RepairSourceWindows with the correct source location. A mismatched source can fail to repair Windows or introduce another compatibility problem. Refer to Microsoft’s DISM source guidance before using this method.
Run sfc /scannow again after DISM completes, restart, and test the program.
4. Repair or reinstall only the affected application
If Windows features work normally and only one program reports the error, the problem may be in that program’s installation or dependency handling. The application may also require a newer Windows version.
Use the program’s own repair process first:
- Open Settings.
- Select Apps > Installed apps on Windows 11, or Apps > Apps & features on Windows 10.
- Select the affected application.
- Choose Advanced options if available.
- Select Repair, then test the program.
- If Repair does not help, select Reset only if you are comfortable removing the application’s local data.
For a desktop program without those options:
- Open Control Panel.
- Select Programs > Programs and Features.
- Right-click the program.
- Choose Repair or Change, if offered.
- Follow the installer prompts.
For a game or launcher, use its Verify files, Repair, or Scan and repair function. If that fails, uninstall the program, restart Windows, and reinstall it from the developer’s official installer or launcher. Reinstalling that program is the definitive fix when its own package or dependency configuration is damaged.
Do not copy windows.devices.smartcards.dll into the application folder unless the application vendor specifically directs that procedure. A Windows API component placed beside an executable may be the wrong build and can hide the actual installation problem.
Rank #3
- Compact And Lightweight Dongle Form-Factor Card Reader
- Accepts Cards In Id1 Format (Iso8716)
- Ccid Compliant
- Compact and lightweight dongle form-factor card reader
- Accepts cards in ID1 format (ISO8716)
5. Check Windows and application architecture
A 32-bit program and a 64-bit program can request different component paths. On 64-bit Windows, a 32-bit application generally uses the 32-bit system components associated with SysWOW64, while a 64-bit application uses the 64-bit components associated with System32.
Check your Windows architecture:
- Open Settings.
- Select System > About.
- Look at System type.
Then check the application’s documentation or installer for its required architecture. Do not mix x86 and x64 DLLs, and do not treat a known version number as proof that it is correct for your installation.
Also check the application’s minimum Windows version. Microsoft’s SmartCard class documentation lists the API contract requirements. An application compiled for a newer Windows API can fail on an older release even when the operating system itself is healthy.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware match6. Update drivers only when smart-card hardware is involved
The DLL is an API component, not a smart-card reader driver. Driver work is relevant when the error occurs while detecting or using a reader, card, NFC device, or related hardware.
To check the reader driver:
- Right-click Start.
- Select Device Manager.
- Expand Smart card readers, NFC, Biometric devices, or Universal Serial Bus controllers, depending on the hardware.
- Right-click the relevant device and select Update driver.
- Choose Search automatically for drivers.
- Restart Windows if a driver is installed.
If the device has a warning icon, right-click it, select Uninstall device, restart, and allow Windows to detect it again. For a vendor-specific reader, obtain the driver from the hardware manufacturer’s official support page.
Outbyte Driver Updater can show which installed drivers it identifies as stale instead of making you hunt through several hardware categories; the scan is available before the full-version driver installation, and updating the driver is optional unless the reader itself is malfunctioning.
7. Check the Smart Cards service when card functions fail
The Windows service is called Smart Cards for Windows and uses the service name SCardSvr. It manages reader slots and application interaction with smart cards. It is separate from windows.devices.smartcards.dll.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Check it only when the problem involves a card reader or card operation. A generic DLL launch error does not automatically mean that this service is responsible.
To inspect the service:
- Press Windows + R.
- Type
services.mscand press Enter. - Find Smart Card.
- Check whether its status and startup configuration match your organization’s requirements.
- Right-click it and choose Start or Restart if appropriate.
You can also open an elevated Command Prompt and run:
Rank #4
sc queryex scardsvr
If the service needs restarting:
net stop SCardSvr
net start SCardSvr
Microsoft’s Smart Card troubleshooting documentation covers these service checks. If the service runs but the DLL error appears before any card operation, return to DISM, SFC, and application repair.
8. Check antivirus quarantine and run a security scan
Security software may quarantine a damaged or falsely detected system file. Malware can also modify or remove Windows components.
- Open Windows Security from the Start menu.
- Select Virus & threat protection.
- Open Protection history.
- Look for an entry involving the DLL or a Windows system component.
- Restore it only if the item is identified as a legitimate Microsoft-signed Windows file and you understand why it was quarantined.
- Run a Full scan.
- After the scan, run DISM and SFC again.
Do not permanently disable antivirus protection to make the application start. If the file repeatedly disappears, investigate the security event and the system for malware rather than replacing it from an untrusted source.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.If Windows repair still fails
Use escalation rather than manually replacing the file.
Try System Restore
If the error began after a driver, update, or software change and a suitable restore point exists:
- Open Start and search for Create a restore point.
- Open it and select System Restore.
- Choose a restore point dated before the error began.
- Review the affected programs and complete the restore.
Microsoft’s recovery options explain what System Restore changes and when to use it.
Reinstall the current version of Windows
On supported Windows 11 systems, open:
Settings > System > Recovery > Fix problems using Windows Update > Reinstall now
This reinstalls the current Windows version while repairing system components. Follow Microsoft’s repair reinstall instructions.
Best Value
- DOD Military CAC USB Smart Card Reader for Government ID, National ID, ActivClient, AKO, OWA, DKO, JKO, NKO, BOL, GKO, Marinenet, AF Portal, Pure Edge Viewer, ApproveIt, DCO, DTS, LPS, Disa Enterprise Email etc. CAC Cards
- Compatible with windows (32/64bit) XP/Vista/ 7/8/10, Mac OS X
- Sleek Ergonomic Design -Gloss Black Finish. EMS ready.ISO7816 Class A,B and C.
- What You Get: Saicoo CAC Smart Card Reader, 18-month warranty and lifetime technical support.
If that option is unavailable, use supported Windows installation media for an in-place repair, carefully selecting the option to keep personal files and applications when offered. Back up important data first.
Use Windows recovery or reinstall Windows
If multiple system files, services, or Windows features are failing and repair installation does not work, use the appropriate Windows recovery option. A clean installation is the last resort and removes applications and, depending on the chosen method, personal data. Back up files and confirm you have the necessary account and application information before proceeding.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →What not to do
- Do not download
windows.devices.smartcards.dllfrom a random DLL archive. - Do not copy an isolated DLL into
System32,SysWOW64, or an application directory. - Do not mix 32-bit and 64-bit builds.
- Do not use Visual C++ Redistributable, DirectX, or .NET installers as the normal source of this Windows component.
- Do not run
regsvr32as a routine fix. This WinRT system DLL is not established as a DLL that should be manually registered, and the command can return an entry-point or registration error. - Do not confuse the DLL with the
SCardSvrSmart Cards service. - Do not ignore an application’s minimum Windows version or its own file-verification process.
FAQ
Is windows.devices.smartcards.dll legitimate?
Yes. It is a Microsoft Windows Runtime component for the Windows.Devices.SmartCards API.
Is there an official standalone download?
No standalone Microsoft download package for this DLL has been identified. Repair Windows with DISM and SFC, or repair the affected application when only one program is involved.
Does the Smart Card service need to run?
Only when smart-card or reader functionality is affected. SCardSvr is separate from the DLL, so restarting it will not normally fix a general application startup error.
Should I run regsvr32?
Generally no. Manual registration is not a standard repair for this WinRT component.
Why does only one application report the error?
The application may have a damaged installation, incorrect dependency information, incompatible architecture, or a minimum Windows version that your system does not meet. Verify or repair the application before changing Windows files.
What is the correct first repair?
Install pending Windows updates, restart, then run DISM followed by sfc /scannow in an elevated Command Prompt. If only one application is affected, also use its built-in repair or file verification function.
Quick Recap
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.
