uiautomationcoreres.dll is a legitimate Microsoft Windows component, not a DLL you should download from a random website. If Windows or an application says it is missing, not found, corrupt, or unable to load, repair Windows first, then repair the specific application if only that program is affected.
What uiautomationcoreres.dll does
uiautomationcoreres.dll is the resource component associated with Windows UI Automation. UI Automation allows accessibility tools, automated testing software, and applications to communicate with controls such as windows, buttons, menus, and text fields. Microsoft documents the related UIAutomationCore.dll as the core runtime used by UI Automation clients and providers.
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Microsoft lists uiautomationcoreres.dll alongside UIAutomationCore.dll in serviced Windows packages. It ships with Windows rather than as part of Visual C++ Redistributable, DirectX, or .NET. See Microsoft’s UI Automation overview and its Windows UI Automation file information.
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File and version identification
| Item | What to know |
|---|---|
| File | uiautomationcoreres.dll |
| Role | Windows UI Automation resource component |
| Publisher | Microsoft |
| Operating systems | Windows and Windows Server releases that include UI Automation |
| Location on 64-bit Windows | Native 64-bit files use %windir%System32; 32-bit processes are redirected to %windir%SysWOW64 |
| Version and size | Vary by Windows release and servicing level |
Microsoft’s published examples include version 7.2.9200.16384 at 33,792 bytes for Windows 8 and Windows Server 2012, and version 7.2.9600.16384 at 34,816 bytes for Windows 8.1 and Windows Server 2012 R2. Do not treat those older examples as universal Windows 10 or Windows 11 versions.
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On 64-bit Windows, a 32-bit application can use the x86 system copy through Windows file-system redirection while a 64-bit application uses the native x64 copy. That is why one application may fail while others continue to work.
First, identify the actual error
Read the filename in the message carefully. These are related but different files:
uiautomationcoreres.dllUIAutomationCore.dll
An error mentioning UIAutomationCore.dll is not automatically fixed by finding the resource DLL. Also, “The specified module could not be found” can mean that a dependency of the named DLL is missing, not necessarily that the named file itself has been deleted.
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Common reported variations include:
- “The program can’t start because uiautomationcoreres.dll is missing from your computer.”
- “This application failed to start because UIAutomationCoreRes.dll was not found.”
- “Error loading UIAutomationCoreRes.dll.”
- “The file UIAutomationCoreRes.dll is missing or corrupted.”
- “UIAutomationCoreRes.dll could not be loaded.”
- “UIAutomationCoreRes.dll is either not designed to run on Windows or it contains an error.”
The wording alone does not prove malware. Windows component corruption, an interrupted update, a wrong-architecture file, or a damaged application can produce similar messages.
Fix 1: Install Windows updates and restart
A pending or interrupted Windows update is the safest issue to resolve first.
- Open Start and select Settings.
- Select Windows Update.
- Choose Check for updates.
- Install every available update.
- Restart the computer, even if Windows does not immediately require it.
- Open the affected application again.
If the application starts normally, the missing component was likely restored or the pending servicing operation was completed. If the error remains, continue with DISM and SFC.
Fix 2: Repair Windows with DISM and SFC
DISM repairs the Windows component store. SFC then checks protected system files and replaces damaged copies using that repaired store. Run DISM first.
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- Open Start.
- Type
Command Prompt. - Right-click Command Prompt and choose Run as administrator.
- Select Yes if User Account Control asks for permission.
- Run this command:
DISM.exe /Online /Cleanup-image /Restorehealth
- Wait for it to finish. Do not close the window while it is working.
- After DISM completes successfully, run:
sfc /scannow
- Wait until the verification reaches 100 percent.
- Restart Windows and test the application again.
SFC may report that it found and repaired corrupted files, found no integrity violations, or found files it could not repair. A successful repair should remove the error after restarting. Microsoft provides the official System File Checker instructions.
If SFC cannot repair everything, restart and run the same sequence once more. If DISM reports that repair files could not be found, use a matching Windows installation source rather than downloading an individual DLL. Microsoft explains the /Source and /LimitAccess approach in its guide to repairing Windows Update corruption. The source must match the installed Windows version and architecture.
Repeating repair commands without knowing whether the component store changed can make troubleshooting tedious. Outbyte PC Repair offers a free scan that shows what it identifies; repairs are performed by the full version. It is optional, and Windows Update plus DISM and SFC remain the appropriate first repair path.
Fix 3: Repair the application that fails
If Windows starts normally and only one game or application reports the error, the application may have an incomplete installation, damaged files, or a dependency problem. Do not assume that the entire operating system is broken.
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- Open Settings.
- Select Apps and then Installed apps.
- Find the affected application.
- Select the three-dot menu beside it.
- Choose Advanced options, if available.
- Select Repair.
- Start the application again.
Some desktop programs use their own launcher instead:
- Open the program’s launcher.
- Open its library or installed-games list.
- Select the affected title.
- Look for Verify, Scan and repair, or Repair files.
- Let the process complete, then restart the program.
If no repair option exists, uninstall and reinstall the application using its official installer or launcher. Restart Windows between uninstalling and reinstalling if the program’s uninstaller requests it. This is the definitive fix when the application itself packaged or installed a damaged dependency.
Do not copy a replacement DLL into the application folder. The program may require a specific Windows component, architecture, or servicing state that a copied file cannot provide.
Fix 4: Check Microsoft Defender quarantine
Microsoft Defender may have quarantined a file after detecting an alteration. Check its history before attempting to restore anything.
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- Open Start and search for Windows Security.
- Open it and select Virus & threat protection.
- Select Protection history.
- Review recent detections.
- Expand a detection to inspect its name, path, and action.
- Restore or allow the item only if the location, Microsoft signature, and origin are trustworthy.
Restoring a file is not automatically safe. If the detection is genuine malware, restoring it can put the computer at risk. Run a full scan if the file was altered unexpectedly:
- Open Windows Security.
- Select Virus & threat protection.
- Choose Scan options.
- Select Full scan.
- Choose Scan now.
For a suspected deeper infection, use Microsoft Defender Offline scan from the same Scan options page. Microsoft explains this process in its Defender Offline guidance.
Protection History retains events for only a limited period, so an older quarantine event may no longer appear. If the history is empty, continue with Windows repair rather than assuming the file was never quarantined.
Fix 5: Check the application’s architecture
A 32-bit program on 64-bit Windows may fail because it needs the x86 system component while 64-bit programs use the native x64 copy. Windows normally handles this with System32 and SysWOW64 redirection.
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%windir%System32contains native 64-bit system files.%windir%SysWOW64contains 32-bit system files used by 32-bit processes.
The names are unintuitive, so do not infer architecture from the folder name alone. Do not replace an x86 file with an x64 file, or use a file from a different Windows release. Microsoft documents this behavior in its File System Redirector reference.
If only a 32-bit application fails, repair or reinstall that application and complete DISM/SFC before investigating further. If both 32-bit and 64-bit programs fail, system-wide Windows corruption is more likely.
Fix 6: Update a driver only when the application points to one
There is no established general connection between uiautomationcoreres.dll and a particular graphics, audio, chipset, or input driver. Do not use Device Manager as the first response to this DLL error. Consider a driver update only if the affected application also reports a device problem, crashes after a driver change, or its official support instructions identify a driver dependency.
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To check a device manually:
- Right-click Start.
- Select Device Manager.
- Expand the relevant category, such as Display adapters or Sound, video and game controllers.
- Right-click the device.
- Select Update driver.
- Choose Search automatically for drivers.
- Restart Windows if a driver is installed.
If the problem began immediately after a driver update, open the device’s Properties, select the Driver tab, and use Roll Back Driver if that button is available. Otherwise, obtain the driver from the computer or device manufacturer, not from an unofficial driver repository.
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Manually matching driver versions across several devices can take time. Outbyte Driver Updater offers a free scan that identifies what it finds; driver installation is done by the full version. It is optional and should not replace repairing the affected application or Windows component when those are the actual cause.
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Do not download the DLL from a random site
Third-party DLL download sites can provide malware, the wrong Windows version, the wrong language, or the wrong x86/x64 architecture. A copied file may also fail because the underlying component store or another dependency is damaged. Use Windows Update, DISM, SFC, an official Windows repair source, or the affected application’s official installer instead.
Do not run regsvr32 routinely
regsvr32 registers DLLs that expose a registration entry point such as DllRegisterServer. It is not a general-purpose repair command, and registering a Windows resource DLL is not an evidence-based fix for this error. Microsoft documents what Regsvr32 does and the limitations of self-registering DLLs.
Do not install unrelated runtimes first
Visual C++ Redistributable, DirectX, and .NET can be required by an application for other reasons, but they are not the normal source of uiautomationcoreres.dll. Install or repair one only when the application separately identifies that runtime as missing.
Do not delete either UI Automation DLL
Deleting UIAutomationCore.dll or uiautomationcoreres.dll because an application crashes can turn a localized application problem into a Windows component problem. Let DISM and SFC determine whether protected files need repair.
If the error still remains
Record the exact message and check these details:
- Does it name
uiautomationcoreres.dllorUIAutomationCore.dll? - Does Windows itself fail, or only one program?
- Is the affected program 32-bit or 64-bit?
- Did the issue begin after a Windows update, application update, cleanup, or antivirus detection?
- What result did DISM report?
- What result did SFC report?
- Does the application have a repair or file-verification option?
If the problem began immediately after an update or software installation and DISM/SFC did not resolve it, System Restore may help:
- Open Start and search for Create a restore point.
- Open it and select System Restore.
- Choose a restore point from before the problem began.
- Review the affected programs and settings.
- Confirm the restore and allow Windows to restart.
System Restore affects system files and settings and can undo later software installations or changes. Microsoft describes this recovery method in its guide to point-in-time restore.
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FAQ
Is uiautomationcoreres.dll malware?
No. It is a legitimate Microsoft Windows UI Automation resource component. An altered or counterfeit file can still be dangerous, so check its location, signature, and Defender history if the file appeared outside normal Windows locations.
Should I install Visual C++ to fix it?
Usually no. This file belongs to Windows UI Automation, not the Visual C++ Redistributable. Repair Windows first and repair the affected application if only one program fails.
Why does only one game or application show the error?
That program may be damaged, incompletely installed, or using a 32-bit component while other programs use a different architecture. Verify or repair its files, then reinstall it if necessary.
Can I fix it by copying the file into System32?
Do not. The file may be the wrong architecture or release, and copying it does not repair Windows servicing or missing dependencies.
Should I enable a Windows Feature?
Not as a routine fix. UI Automation is a Windows component, and enabling unrelated Windows Features does not replace DISM, SFC, or application repair.
When should I use System Restore?
Use it when the problem clearly began after a recent update or installation, automatic repair did not help, and an appropriate restore point exists.
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