Could you please check if My Pictures folder is not redirected to somewhere?
yes, "My Pictures" is redirectected to "D:\My Pictures".
I hav a German Windows 7 so the folder is called here "Eigene Bilder".
But I also tested it with an new windows user that has NOT redirected the folder.
Same error message.
When you redirect a folder for a user generally it creates registry entry in HKCU but as you reported may be on your machine registry in HKLM is created.
Check once if you have and folder redirected for that user or any network drive is mapped or you have in your PC
HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Explorer \ User Shell Folders registry key some other than expected value.
I have multiple problems with Windows 7 Professional x64 & the Adobe products installed on my machine (English).
I have a dual processor Intel Duo Core2 - Dell Lattitude E6400XFR, running Windows 7 Professional x64 Service Pack 1(English).
Adobe, & Adobe Reader are installed properly & function okay for the most part, save for the very newest & fanciest of documents. Mainly, the issue I have is that Adobe/Reader are constantly attempting to update, & are able to download a version recognized as newer than the current version installed, then will not install completely or at all. Once that occurs it will then immediately demand to be updated by this newer version. It's a crappy loop that I have become familiar with & is lame.
Either Adobe & Adobe Reader are problematic with Windows 7 Professional x64 SP1 ENGLISH, or this dual processor Intel motherboard is the problem. The latter doesn't seem likely however, I have identified multiple problems with drivers & whatnot that do not function well or properly solely due to the motherboard. My Nvidia On Board GPU & the drivers & software would be the prime & most annoying example of something that hates my motherboard.
I hope this isn't "Hijacking" your post, I am having a problem that sounds similar to yours, the international/localization issue(s) notwithstanding.