Windows 2003 sbs logon loop

Hi,

I have a microsoft Win 2003 server sbs at my office,
I can' t log in to my server now becoz it shows " windows needs to be activated " and when i click activate it says you are already activated. Basically it is a loop. so that i can't log in.

It is a domain server, and the others users are getting their domain validated and are able to access the shared folders in the server. so i think it may be due to activatcion check file corruption What i would like to know is , can I repair the windows 2003 server sbs, just like you do a repair in windows (not the console or automated repair but when you re install the entire operating system while leaving all documents and applications intact)

Or is there any other workaround for this ? many thanks

ps.I'm not able to get into the safe too

 

Let me elobrate

Hmm.

I am not able to login to do that. Also i can't boot to safe mode.

thanks