It happened again today (Sunday 9/18) just like last Sunday (9/11). I had the computer on from 8:30-11:30 this morning, and the shortcuts were there. Turned it back on around 12:45pm, went to do other things while it came up, and when I got back a few minutes later those shortcuts were gone. Last time & this time I checked the Recycle Bin, but they were not there.
As far as I can see, my Desktop contains 3 kinds of things:
1. links to programs - none of which are affected.
2. actual pdf files - none of which are affected
3. links to individual pdf & xls files - all of which disappear when this happens
Further, it appears now that this is happening according to a schedule. Now that I'm writing about it I can see that the last 3 occurrences have been on the last 3 Sundays.
As to mta's last comment, I'm using Avira Antivirus Pro. I've searched thru that as well as I know how, but don't SEE anything that looks like it might be the culprit. (That doesn't mean it's not, but if it is I haven't spotted it.)
I also have McAfee's Security Scan Plus installed. As far as I can tell, the only thing it does is a 2-minute scan every Thursday evening.
The closest thing I can think of to another suspect is GWX Control Panel, designed to keep Microsoft from turning my Win7 pc into a Win10 pc. But I can't see anything that would make it a likely suspect either.
I guess one of the Win7 automatic updates could have done something to cause this (somewhat like the link that Andavari found talks about). I'll have to re-read that and do more research in that direction.
Meanwhile, if anyone here comes up with any ideas, please let me know.
Thanks,
Tim