Hi guys.

Okay, weird problem - sometimes when I delete or rename a file on my
desktop, my screen flicks off for half a second or so, then comes back to
life with no apparent ill effects. Any idea what could be causing this? It
doesn't always occur, and my system seems to behave more often than not.

I've trawled the web for ages trying to find a solution, without any luck. I
would welcome any suggestions...

Many thanks!