I am helping someone with a laptop that has what sounds like streaming video in the background with no windows open, the volume mixer shows the sound but says "Name Not Available". Also, if I try to install Service Pack 1 for Windows 7 x64, it fails with an error - arithmetic result exceeded 32 bits.
Malwarebytes full scan shows no infections.
Any help would be appreciated.
Edited by XanderBrown, 10 January 2014 - 05:15 PM.