C:\Documents and Settings\All Users\Documents is a rather strange name for a file (although not strictly forbidden). Are you sure it's (a) it's the full filename and (b) it's a file, not a folder.
Are you sure the account you're using to install the program is an Administrator account?
You can try to take ownership of whatever you need. It's described in http://support.microsoft.com/kb/308421 and in XP Home only works after booting in Safe Mode.
By the way, I deleted your first (nearly identical) post.
Hope this helps.
was having issues with Adobe Pro 8. so i uninstalled the program. when i went to reinstall the program it would get hitched up about midway through the installation on a file C:\Documents and Settings\All Users\Documents. the msg says the file is inaccessible. retry does nothing, so you have to back out of the install completely. when i try to delete the file myself (or even edit it) it does not let me, says the file is inaccessible. has anyone run into this issue before? any help would be appreciated. need adobe pro to function. thanks!