Puoi eliminare:
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,SearchAssistant = http://search.bearshare.com/sidebar.html?src=ssb
O2 - BHO: Class - {62EF62E3-8D48-B438-338B-7840626450D4} - C:\WINDOWS\ppajd1.dll (file missing)
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O3 - Toolbar: BearShare MediaBar - {D3DEE18F-DB64-4BEB-9FF1-E1F0A5033E4A} - C:\Programmi\BearShare applications\BearShare MediaBar\MediaBar.dll (file missing)
O3 - Toolbar: (no name) - {4E7BD74F-2B8D-469E-CCB0-B130EEDBE97C} - (no file)
O4 - HKLM\..\Policies\Explorer\Run: [1] C:\WINDOWS\service32.exe [da rimuovere con un antirootkit, sennò non te lo fa cancellare]
O21 - SSODL: bonspells - {11853d5f-f894-4cc7-bbc3-fc7a9dcfd896} - (no file)

In grassetto quelli pericolosi.