Igor intervened - OP has the option to send in a minidump file which is good option.
However our issue is important zyndstoff and probably more so when computer can boot into Normal mode and there are still problems, and not the least because I dont really know either, but like you I sure do want to find out. There has been a few situations that appear somewhat similar to the OP's issue and I would say at a guess that there is a program, a device or a driver on the OP's computer that is proving to be a spanner in the works. And more often than not, this will then confuse (for want of better word) the process at the time that is being represented by AvastSVC and so is unable to perform to task.
Just an example, I have to go out for a while and I dont want to drop this just now because we might be able to devise some workarounds for users that allow them to test their Security Suite. and also see if anything comes back from Igor, etc. I will be back.
And I just dont think the Help Center gets used enough. there are some great sheets in there, and simply written, ideal for newbs to get their heads around.
Edit - OP reinstalls Security Suite, boots into Safe Mode, runs a HijackThis analysis.