I've been using the excellent PDFCreator for more than 2 years. Today it failed with an empty message box (just an OK button). I removed the software and attempted to install the latest version. It appears to install fine until it gets to the point of adding the printer to the OS - here it fails with an "Access Denied" error message.
I then downloaded Primo32 and that did the same - almost all the install completed and then "Access Denied" at the 'add printer to XP' stage.
Finally, I tried adding any old printer using the Add Printer Wizard. I made out that it was connected to LPT1 and added the first printer in the list. "Unable to Add Printer. Access Denied".
This is a single user machine and I am in the Administrators Group.
I'm guessing this is a permissions issue. I have carried out some bizarre command line security reset procedure (secedit?) but to no avail. I have downloaded an HP Access Denied fix, but that didn't work.
I don't have much more hair to lose, but I'm pulling it out fast while I try to avoid a whole OS reinstall!