Res - Rename ALL your files that you are having problems with (my comp-right click-explore) ONE AT A TIME to <filename>_old - reinstall same program to see if that works or not. If yes, then rinse + repeat and take selective sections that are from _old and insert them (in proper place) after scanning them with an AV prog
After you dig out the files you need, delete them with REVO
http://download.cnet.com/Revo-Uninst...-10687648.html
If that doesn't work then I'd try a GOOD AV program like AVAST,
http://download.cnet.com/Avast-Free-...-10019223.html
etc to knock down any potential problems there
Hope this works
It was a file in my steam folder, blob something, deleted it and restarted steam.
Fixed it.
Still doesn't explain the others.
Sure, give no credit to me.
The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.