Security & Permissions Too good? - Error 5 Access is denied.

My not quite 3 months old Win 7 system has taken a notable dislike to me trying to install programs now that I have an actual need to burn some disks of the data and DVD kind.

For certain programs I am getting that lovely little message box which states;
"Unable to execute file in the temporary directory. Setup aborted. Error 5: Access is denied."

I previously used DVD Flick on my XP machine, but it will not finalize the process to burn discs on this PC. I have attempted to use some others, none of which worked or even fully installed, and settled for trying out the highly rated Aimersoft program. No dice, error 5.

For data optical disks I tried a couple of programs that likewise wouldn't work or fully install once Ashampoo decided my trial was expired after I had used it all of once a week or so ago. IMGburn did it's "no drives detected" thing, so I downloaded CDburnerXP, which promptly followed the same route as the Aimersoft download for causing an error 5.


After a morning spent Googling fixes, none of which have worked, I guess I'll throw it up on here.

Permissions seem to be fine for User and Administrator, as in all allowed.
Run as Administrator or compatibility to XP SP 3 did not work.
Redirecting to a C:\Temp folder did not work.
Exiting Comodo Firewall and disabling Avast shields does not help.

In case it was malware or a virus I did a full scan with Avast, no results, then downloaded Malware Bytes which installed, scanned, and removed a couple low level things from the OpenCandy add-on used by prior free burning program downloads.

Not a clue what is wrong as usual, and I'd like to purchase Aimersoft if I could get it installed, but I'm really not keen on paying ~30 or so USD for a data burning program given how rarely I try to burn anything like that.