What happened in installation was first turning off Avast! for 10 minutes, then beginning the SA installation. As the time approached 10 minutes, I figured I don't want the two AVs clash so I uninstalled Avast!
It required rebooting and as SA already installed, I thought it would be OK to do that. The computer (64-bit Windows 7) crashed, but I was able to boot again normally.
Question: for the other installations, should I leave Avast! in operation and uninstall later, or...? Thanks in advance.
Best answer by RetiredTripleHelixView original