My system has been crashing on and off for some time but until recently not so bad as to make me want to do something about it other than make sure i save files on a regular basis. It just stops - no time so save anything to a log so no clues there. System: W7 64bit Pro SPI. Quad core 9300 CPU on Gigabyte board. 4Gb RAM Clues - happens usually when the either of the browsers (IE 22.214.171.124 1642) and FF 6.0.2) are open and almost guaranteed to happen if I have looked at something in Facebook, or other streamed video, and it seems to happen only at the moment the mouse is in use. It happens with both browsers. Things done so far (all a waste of time): Reinstalled the OS Installed latest drivers for everything Installed the latest DirectX from Micrsosoft. Checked with Kaspersky as there is an alleged problem with the on-board nVidia network card - got the latest suite for nothing but no result and Kaspersky refuse to comment either way about a problem! Anyone any ideas?