my computer loses time ;_;

around 7ish pm the clock goes backwards one hour. Sometimes it fixes it self to the correct time only to go back one hour the next day.
Any ideas why it would do that?

sounds like your daylight savings is going crazy. try disabling the automatic adjust for it? I'm just guessing, since I have no idea how to Google that.

Or it might be a joke virus.

check your cmos battery too while you're at it

dont most OSes ignore the cmos after you do ntp?

ntpupdate FTW if you are using a *nix.