That is often linked to virtual memory. Try these:
The win32k.sys is corrupted. Go to
C:\WINDOWS\System32 and rename the Win32k.sys file to Win32k.old and then close the window. Now go back to the system32 folder and it will write a new Win32k.sys file.
If that does not alter anything, then disable and then enable the Virtual Memory to see whether it
solved the problem.
Disable Virtual memory:
1. Right click Computer and choose properties
2. Click the Advanced System settings (over on the left)
3. Click Performance - settings.
4. Click the Advanced tab.
5. Under Virtual memory click change
6. Click no paging file an the "Set", for the current OS/partition.
7. Click OK
8. Restart the computer
To enable Virtual memory reverse the...