How to fix error 0x0000003f in Windows 11

Solution Steps

1. 1 Press Windows key + R, type 'regedit' and press Enter. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management. Look for a DWORD value named 'PoolUsageMaximum'. If it doesn't exist, create it (right-click → New → DWORD (32-bit) Value). Set its value to 64 (decimal). This increases the maximum pool usage, giving the system more PTEs.
2. 2 In the same registry key, look for 'PagedPoolSize' and 'NonPagedPoolSize'. If they exist, set them to 0 (decimal) to let Windows manage them automatically. This can help prevent PTE exhaustion.
3. 3 Close unnecessary programs and background processes. Press Ctrl+Shift+Esc to open Task Manager. Go to the 'Processes' tab and end any high-memory processes you don't need. This frees up system resources.
4. 4 Check for driver memory leaks. Use Windows Reliability Monitor (Win+R, type 'perfmon /rel') to see if a specific driver is causing issues. Look for critical events around the time of the crash.
5. 5 Update your drivers, especially network and graphics drivers, as they are common sources of memory leaks. Visit the manufacturer's website for the latest versions.
6. 6 If the error persists, increase the system's virtual memory: Press Win+R, type 'sysdm.cpl', go to Advanced → Performance → Settings → Advanced → Virtual memory → Change. Uncheck 'Automatically manage paging file size', select your system drive, choose 'Custom size', and set Initial and Maximum size to 1.5 times your RAM. Click Set and OK.