OK, this one seems to be coming up a lot but no one's been able to answer it (including Microsoft) so I'll ask and be as specific as I can.
Because I work with vector art I have to constantly save files by over-writing them and everything was cool with WinXP pro. I just got Win7 Pro and everything was cool, until recently. Whenever I tried to overwrite my files, I'd get error messages saying the file was either read-only or was open elsewhere, but it only happened about 50% of the time. A had to start re-saving files with different names. after getting the files re-saved i would then try to delete and rename the files, but found i couldn't do either, as I was constantly getting the error message 'The action can't be completed because the file is open in Windows Explorer.' Closing and reopening explorer does nothing. Someone else mentioned emptying the recycle bin works, but not for me. Being that the files are on an external drive I attempted to disable write caching through device manager and the windows Management Console (or whatever) froze up and took the pc with it (nice job, MS!). Rebooting seems to fix the problem for a little bit, but it returns quickly and at random. It also seems to pick files at random to lock up. Some files I can't change, some I can. Others start functioning after a while of inactivity.
I tried disabling thumbnails in Explorer and even added a NoThumbnailCache DWORD in the registry, but it still happens. I'm basically going to have to save all new files over and over again and only occasionally be able to delete the old ones while only randomly being able to over-write others. This issue seems to be plaguing Vista and Win7 and people have been waiting for a fix, but Microsoft's been very mum on the issue. If anyone can come up with a fix, that would be great. This is killing my productivity!