I have only had it happen with Solidworks files. Not all users have Windows 7, some are using WinXP.
I can't say for sure, but I'm inclined to think everyone does have administrator permissions. We do not have any kind of IT dept, so everyone is responsible for installing/maintaining their own...
I work for a company with 9 seats of solidworks 2010 and a central server on which all SW files are kept. We do not use any PDM software.
I recently upgraded to a new computer (Windows 7 64bit) and a new SW license, and now whenever I open an assembly, edit and save it, then close it, other...