I'm running Windows 7 64 bit, Ultimate.
I'm running into a problem where, if my computer is on long enough, I am unable to install any software.
For example, if I reboot and try to install something, for the most part, it will succeed.
if I try and install something after a few hours/days, it will always fail. Sometimes stating that "a previous install failed..." or "an install is already taking place..." even though there is nothing being installed.
This also seems to be making my Windows updates fail at a pretty regular rate.