Recently I was forced to switch to Windows Vista and am experiencing strange behavior of the file system. In some mystical way there are files, which contents are different when opening them from different programs or different user accounts. Even deleted files sometimes could be opened so far like they were still on the disk. It seems also like the system allows for restricted user to have a "virtual local copy" of protected system files, write them with different data, while admin sees the same file but with original contents. The same effect appeared also with HKEY_LOCAL_MACHINE registry keys - they could be written by restricted user (!!!), but the changes are invisible for administrator. What's the heck - errors, new sophisticated Windows features, viruses? Thank you.