Recently I’ve seen another infection of the win32/olmarik.AJL master boot record virus on a Windows 7 machine which was running the latest version of Norton 360.
The symptoms were all there – the machine could not get to the Windows Update website, occasional browsing redirects, random blue screens. The virus hides itself from the O.S. and interferes with network traffic.
Running an Eset Rescue CD scan found many infections which it cleaned but the Eset Rescue CD sometimes cannot remove MBR viruses. For this I used Kaspersky’s excellent TDSSKiller which can run in Normal of Safe mode and quickly identifies and removes these.