Vista - Issues after catastrophic OC

Hi folks, I've been messing around in my BIOS. Installing some faster RAM and trying a slight overclock (2.4 t0 2.7Ghz on a Q6600) and seem to have caused myself several problems.
Firstly I tried to push it a bit further on the FSB- from 1200 to 1300-the system wouldn't boot and wouldn't let me into the BIOS.
I eventually got round this by removing the mobo battery. I was able to get back into the BIOS and revert to my original oc.
However when I booted I got a re register Windows this is not a genuine version notice.
I had to 'phone microsoft and get a new activation ID.
I'm now back in windows (Vista HP 64 bit) but seem to have a few left over issues.
My clock was set back to 2006 and that meant I couldn't activate Gmail etc.
I went back into the BIOS and reset the date but could not change the day. So it's 3.19PM on Monday the 22nd of September, 2008. I've tried everything I can think of but cannot find a way to make it Friday, which it is.
Also I have Kaspersky Internet Security 2009. This keeps reporting that my computer is at risk and I need to update. I've updated over a dozen times but it doesn't seem to change and is still telling me it needs to update.
These are ther first problems I have noticed. I hope I don't find more.
Does anyone have any advice as to how to get my day and date correct and how to convince Kaspersky it's up to date?
Many thanks, John

Forget that. Stupid oversight on my part and the problem is now sorted.
Cheers, John