We have an x64 Windows 7 professional machine on which some but not all fonts can not be removed. The problematic fonts in question are not system fonts or Microsoft Office fonts (I think, they haven't updated the list for Office2010). One example: StoneSansOSITC TT (filename
IT243__.ttf). Curiously other fonts in the same family could be deleted, about half a dozen.
The error message is something like "this file is in use and can't be deleted [try again] [skip]".
We've tried removing the fonts under a domain account which is member of the local Administrators group as well as the Local Administrator account. We've tried removing from Safe Mode and various combinations of logging off and rebooting.
I used Process Explorer to search for the open file handle, and it identifies
csrss.exe as having that file open, as well as a number of other fonts. I've proved, as the wikipedia article on csrss says, that terminating the process results in a blue screen of death.
How do I track down which application/service/process is causing these files to be in use all the time and shut them down?
This person's similar report indicates there may be a problem with Windows 7 getting confused over how many typefaces are represented in a font family (thinks there are 4 when actually are 6).
This thread has a pic of the error message we see: