Go here for the DSO exploit fix. Make certain though that you have all your critical M$ updates installed.

Scan with hijackthis and tick the boxes next to all the following entries, then close all browser and explorer windows, and hit the "Fix checked" button.

O9 - Extra button: eBay - Homepage - {EF79EAC5-3452-4E02-B8BD-BA4C89F1AC7A} - E:\IrfanView\Ebay\Ebay.htm (file missing)

O23 - Service: NMSAccess - Unknown - F:\CDBurnerXP Pro 3\Tools\NMSAccess.exe (file missing)
O23 - Service: System Commander 7 MBR check - Unknown - C:\SC\WINMBR.EXE (file missing)

Cannot see anything else.