Restore points gone!!

This sounds like Malware. You should attempt to scan with an Online Scan provider.

www.trendmicro.com/housecall

http://onecare.live.com/site/en-us/default.htm

If you are not able to access the internet with this system, you can download trials of your Anti-virus software of choice. Be sure to read carefully for necessary downloads and definition updates for the software you choose.

Better to be safe then sorry.

Let us know
Good luck