Hi. I've got this issue on my Vista laptop that's been there since I got the thing about six months ago. The system clock falls behind the actual time at a silly rate, which can be up to several minutes in a session but varies sporadically. Then every so often it will synchronise with a time server and suddenly catch up. Has anyone heard of a Vista issue that could cause this behaviour, or does it seem more likely to you that it's a hardware problem? Any advice appriciated.