Ok folks things were going fine from last 2 weeks but here's wht happen this time.
I just install a new rather fresh copy of windows 2000 advanced server on one of the box. Now after 2 days i encounter a virus and torjan hoarse i think virus W32. something and trojan i think NIBU. anyways i did a complete scan and remove them safely. But now when i load my windows I receive a message its something like this that :
Your windows registry maximum size is small ..... please refer to windows help....

Well i checked the help which is really no helpful to me .... but i think its relating with service pack as i have SP1 at the moment. But i have been installing it frm quite a long time never encountered any error. So your opinion will be helpful i think