|Presuming you can nonetheless boot up etc. as normal... Go to trend.com and look for "housecall" - a freebie on-line scan (or google for trend housecall). Let it do a full scan. It will take a wee while. Anything it "quarantines" - delete.|
If you can boot to safe-mode with networking then do so and go on-line that way.
Disable system restore before any scan - regardless of whether or not it's on-line or a local utility. Re-enable system restore - only when system is clean.Similarly... uninstall your current virus util; or at least disable it. Then download avast - avast.com - free for home use virus utility.
You have to register it; they don't spam you or pass your email account around. The "free license" is for 14 months; after-which you have to re-register... Once installed, ensure you let it update definitions; then run a "full" scan (it will take a while). And again ensure you disable system restore before the scan; re-enable it only when system is clean.
Anything avast quarantines - delete it; and also empty recycle-bin too - before re-enabling system restore etc.
Ideally secure/safe-guard data first. Get yourself a copy of Knoppix or Ubunut (Linux vaiants on a dvd/cd). Boot with that and you can both transfer data to optical-media; and also go on-line...
You can download the respective iso for each on-line and burn to dvd; boot etc. with that dvd...