I have spent days trying to solve this problem - so any suggestions will be most gratefully received! I run a group of Windows XP Professional (SP3, 32 bit) machines in a workgroup, all using the same id and password, the id being in the administrators group on each machine. One of the machines backs up all the others each night automatically and to do this it needs to first down a service or 2 on the remote machine first. This has worked for donkey's years without trouble using netsvc and/or sc.exe. Until now - having taken the plunge with Windows 7 (64 bit) professional on the latest machine. The id and groups are set up in the same way but the Windows 7 machine does not allow the XP machine to stop its service. I have read dozens of forums (fora?) and advice websites and have tried the following without success already: * Both Windows Firewall and Windows defender are stopped and disabled on the Windows 7 machine. * Previously when this problem occurred for an XP machine, a solution that worked was to set Folder Options - deselected 'Simple File Sharing' and then reboot. The equivalent for Win7 seems to be 'Use Sharing Wizard'. This has been deselected. * The service stop doesn't work on the XP machines unless a drive is mapped from the backing up machine to the machine to be backed up. Accordingly, a drive is also mapped to a share on the Win7 machine. * Administrative Tools->Local Security Settings->Local Policies->Security Options - "Network Access:Sharing and security model for local accounts" is set to "Classic - local users..." * Much advice centres around running the command box "as an administrator" but this doesn't seem to be an option for XP. Therefore I assume not applicable. * One person suggested for Vista, setting [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\system\LocalAccountTokenFilterPolicy] to 1 but I cannot find this on Windows 7. Is it a Vista thing only? Perhaps there are other Security settings or policies that I need to look at?