Well, I did say what was wrong. I cannot open ANY programs. None. Not any of the Microsoft Office (Word, Excel, etc.) programs, not Dropbox, not Avast, not Adobe Reader, not Google Chrome, NOTHING.
What it will let me open is Microsoft Edge. I can then open some websites, but have great difficulty in getting them to load before they time out.
OS is Windows 10
Avast Pro
No other antivirus software
Can't check the CleanUp log file, as it won't open
Any time I try to open a program it tells me the application was unable to start correctly (0xc0000034). This happens for all of them.
No infection.