A customer of ours is running a mixed Mac/PC environment. Windows XP SP3 is installed on all workstations: natively on the PCs, via Parallels Desktop 4 on the Macs. All Windows installations (PCs as well as Parallels) are members of an SBS2008 Active Directory domain configured with roaming user profiles and folder redirection to the SBS2008 server. Problem: Every once in a while, a user logging in to a PC receives the error message: "Auf \\.psf\Home\Desktop kann nicht zugegriffen werden." (\\.psf\Home\Desktop cannot be accessed.) and a blank desktop. Closer inspection of the affected user profile reveals some registry entries under the key "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders" apparently added by Parallels Desktop on the occasion of a preceding logon of the same user on a Parallels installation, and which obviously won't work on a non-Parallels machine: Desktop REG_SZ \\.psf\Home\Desktop My Music REG_SZ \\.psf\Home\Music My Pictures REG_SZ \\.psf\Home\Pictures Apparently the Windows group policy for folder redirection cannot change these back to the correct values pointing to the SBS server because of the wrong type (REG_SZ instead of REG_EXPAND_SZ). I have created a script for clearing out those values and setting the proper ones instead, but it would of course be better to prevent that situation from occurring in the first place. From other threads in this forum, I gather one way of avoiding the problem would be to disable Parallels' shared folder feature, but unsurprisingly, the Mac users are somewhat reluctant to do that. Is there a way to keep these redirections local to the Mac/Parallels installations and prevent their propagation to the server-based profiles, and from there, to the PC installations?