Fixa:
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: ads_optimizer - {9C8A568E-4201-478a-8536-526CF371D2E2} - C:\WINDOWS\system32\nsw44E.dll
O4 - HKLM\..\Run: [Microsoft Setup Initialization] Microsoft Setup Initialization
O4 - HKLM\..\Run: [svcmhnrm] "c:\windows\system32\svcmhnrm.exe"

in modalità provvisoria elimina:
C:\WINDOWS\system32\nsw44E.dll
c:\windows\system32\svcmhnrm.exe