hey guys, recently my AVG Free keep detecting this.

It will only detect it everytime i on my pc. then the rest of the day nothing will appear




i downloaded ad-adware antivirus, run a full system scan and remove quite a number of stuff, but everytime i login, AVG keeps on detecting the same virus. even if i run the scan with ad-adware, they never detect any more virus

and i believe this virus already corrupted my recycle bin.

cause my bin will never be empty, when i click empty recycle bin, they will ask if i want to delete WINDOWS, even if i press yes , they will say another process is using it.
got chance of saving my pc without sending it for reformating? i m using windows xp sp2 btw