I have recently found that the desktop freezes when I open windows' folders to view files, photo's etc. I get the following error: C:\windwows\System32\dumprep.exe The NTVDM CPU has encountered an illegal operation CS: 071c IP: 01a6 OP:64 63 8f 67 66 Choose "Close" to terminate the application. Any ideas? I have either to reboot or sometimes, if I ALT CTRL TAB I can close the open folders down and afetr a short wait, can carry on as normal. Thanks in advance. Bilbosh.