Hi
I have a Dell Dimension E521 desktop PC about 2,5 years old. Operating system Windows Vista.
It works fine when used, but when not used it sometimes have multi-coloured vertical lines across the screen and the PC fan works overtime. The only solution is to restart and do a system restore.
It used to only happen once a while, but lately this has been a much more regular occurrence.
Please could anyone advise what causes this - is it a hardware/software problem? What can I do to rectify this?