Hi, swithch over to the Security Section of this fourm .and post a hijackthis log .
get thijack this here .
Get The latest Version of Hijackthis 1.98

Download 'Hijack This!'.HERE
Download link is on the left

Unzip (extract) it to a folder of its own.Like c:\HJT\hijackthis.exe ,

Then Doubleclick HijackThis.exe (in the new folder), and hit "Scan".
When the scan is finished, the "Scan" button will change into a "Save

Log" button.
Press that, then Ctrl-A to Select All, and copy its contents here. for

hijackthis,most of what it lists will be harmless or even essential,

don't fix anything yet.