High Operating Systems ✓ Solution Verified by Community (0+ upvotes)

How to fix error error-noaccess in Windows 11

ERROR_NOACCESS = 998

65% success rate
👥 0+ users verified
📅 Updated: 2026-08-12
⏱️ 60 min read
Fix based on community reports and expert analysis. Last verified: 2026-08-12 · How we verify fixes
Error Codeerror-noaccess
Affected SystemWindows 11 (Microsoft)
DifficultyHigh
Estimated Time60 min
Requires Admin Rights⚠️ Yes
Requires Reboot🔄 Yes

Solution Steps

  1. 1 Press Windows key + R, type 'mdsched.exe' and press Enter. Choose 'Restart now and check for problems'. Windows will restart and run a memory test. This checks your RAM for errors. If errors are found, you may need to replace the faulty RAM stick.
  2. 2 If the memory test passes, the issue might be a corrupted system file. Open Command Prompt as administrator (Windows key + X, select 'Windows Terminal (Admin)'). Type 'sfc /scannow' and press Enter. This scans and repairs system files. It may take 15-20 minutes.
  3. 3 If SFC finds issues but can't fix them, run DISM. In the same command prompt, type 'DISM /Online /Cleanup-Image /RestoreHealth' and press Enter. This repairs the Windows system image. It can take up to 30 minutes.
  4. 4 Update your drivers. Press Windows key + X and select 'Device Manager'. Expand categories like 'Display adapters', 'Network adapters', etc. Right-click on each device and select 'Update driver'. Choose 'Search automatically for drivers'. Outdated or buggy drivers can cause memory access errors.
  5. 5 Check for Windows updates. Press Windows key + I, go to 'Windows Update' and click 'Check for updates'. Install any pending updates, as they often include fixes for memory-related bugs.
  6. 6 If the error occurs with a specific application, try reinstalling that application. Uninstall it via Settings > Apps > Installed apps, then download the latest version from the official website and install it.

🔍 Didn't work? Enter your GPU and CPU for hardware-specific advice:

🔧 Still having issues?

Describe your exact problem to Error Buddy and get a personalized fix in seconds.

🛠️ Try Error Buddy — It's Free