To disable the Restore button
To disable only the Restore button on the Previous Versions tab on individual client computers, follow these steps:
1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Locate and then click either of the following registry subkeys:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
3. On the Edit menu, point to New, and then click DWORD Value.
4. Type NoPreviousVersionsRestore, and then press ENTER.
5. Right-click NoPreviousVersionsRestore, and then click Modify.
6. In the Value data box, type 1, and then click OK.
7. Quit Registry Editor.
Alternatively, you can use the Reg.exe utility to disable the Restore button. To do this, type either of the following commands at the command prompt, and then press ENTER:
REG ADD HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer /v NoPreviousVersionsRestore /t REG_DWORD /d 1
REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer /v NoPreviousVersionsRestore /t REG_DWORD /d 1