Check the event viewer and see if there are any error logs.
Try a system restore (if you have it enabled).
Run "sfc /scannow" from the run box.
Boot from the windows installer CD and go to the recovery console and type "fixboot" and "fixmbr".
If all else fails, run a repair install from the CD.
ok mate, do you mean 'system restore' as in from the menu that you can choose safe mode and 'last known settings that work' or is this an option somwhere in CP. btw i do have system restore enabled
thanks again