When you login into a VPS Hosting, it alerts me that Microsoft Windows requires activation :

Quoted error:
This copy of Windows must be activated with Microsoft before you can continue. You cannot log on until you activate Windows. Do you want to activate Windows now? To shut down the computer, click Cancel.
But the only thing you can do is close the current terminal session.

CAUSE:
The problem was caused by the Copy-On-Write approach for some of the files listed below.

NOTE: This list has been defined empirically, however the following reference contains information on the required files.

http:// support.microsoft.com/default.aspx?scid=kb;en-us;306081

HOW TO FIX:
Copy the files below from the node c:\windows\system32 to VPS Hosting D:\vz\root\VPS Hosting_ID\C\Windows\system32
- system32\oembios.dat
- system32\oembios.sig
- system32\oembios.bin
- system32\dpcdll.dll
- system32\wpa.dbl
- system32\pid.dll
- system32\pidgen.dll
- system32\licdll.dll
- system32\regwizc.dll
- system32\licwmi.dll
- system32\wpabaln.dll
Than reboot the VPS