I recently received a popup with an offer to update my ZA to 10.0.250. When I did so, it told me to reboot the PC to activate the change. The PC went down and would not reboot. Now my PC will not boot from the C: drive at all, although it will boot my LINUX from the CD/DVD drive.
Normally I run Win7 Pro on this computer.

My question is: Is the popup a virus or a real ZA offer and what if anything can I do about getting the PC working again.