Critical
Software
✓ Solution Verified by Community (30+ upvotes)
How to fix error irql-not-less-or-equal in Microsoft Keyboard Layout Creator (MSKLC)
Driver conflict or faulty memory. Often caused by outdated drivers accessing invalid memory addresses.
Fix based on community reports and expert analysis. Last verified: 2026-08-12
· How we verify fixes
| Error Code | irql-not-less-or-equal |
|---|---|
| Affected System | Microsoft Keyboard Layout Creator (MSKLC) (—) |
| Difficulty | Critical |
| Estimated Time | 20 min |
| Requires Admin Rights | ⚠️ Yes |
| Requires Reboot | 🔄 Yes |
Solution Steps
- 1 Restart Microsoft Keyboard Layout Creator (MSKLC) completely. Close it, open Task Manager (Ctrl+Shift+Esc), find any remaining Microsoft Keyboard Layout Creator (MSKLC) processes, right-click → End Task. Background processes from previous sessions are the most common cause of startup crashes.
- 2 Update Microsoft Keyboard Layout Creator (MSKLC) to the latest version. Open the app, go to Help → Check for Updates (or download the latest installer from the official website). Updates fix known bugs and compatibility issues.
- 3 Reset Microsoft Keyboard Layout Creator (MSKLC) settings. Navigate to %APPDATA%\MicrosoftKeyboardLayoutCreator(MSKLC) and rename the settings folder to add '.old'. This forces Microsoft Keyboard Layout Creator (MSKLC) to create fresh settings — corrupted config files cause crashes.
- 4 Run Microsoft Keyboard Layout Creator (MSKLC) as Administrator. Right-click the shortcut → Properties → Compatibility → check 'Run as Administrator'. Some features of Microsoft Keyboard Layout Creator (MSKLC) require elevated permissions.
- 5 Check if Microsoft Keyboard Layout Creator (MSKLC) conflicts with your antivirus. Temporarily disable real-time protection and test. Add Microsoft Keyboard Layout Creator (MSKLC) installation folder to antivirus exclusions.
- 6 Clear Microsoft Keyboard Layout Creator (MSKLC) cache. Navigate to %LOCALAPPDATA%\MicrosoftKeyboardLayoutCreator(MSKLC)\Cache and delete all files. Corrupted cache data causes rendering and processing errors.
- 7 Repair Microsoft Keyboard Layout Creator (MSKLC) installation. Windows Settings → Apps → Microsoft Keyboard Layout Creator (MSKLC) → Modify → Repair. This replaces damaged program files while preserving your data.
- 8 If Microsoft Keyboard Layout Creator (MSKLC) still won't work: uninstall from Settings → Apps, restart, reinstall from official website. A clean install is the nuclear option but fixes almost everything.
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