Accessing IIS 6.0

Hello,

I am working on administration of IIS 6.0. It has some accounts for students and faculty. But the server slows down generally once or twice a day. It slows down to a limit that people sometime couldn't get into it or takes almost 5 min to save any changes made to file. The only solution I am having right now is to reboot the server and then it works fine. But this is causing me a lot of problems since I need to reboot it twice a day..

The server is of Dell and its real powerful machine but I don't understand why its getting that slow...and I know its not the problem with lincensing or any of such issues...

Do any of you have any suggestions or comments on this..Is there anything I can do to improve its performance.

Thanks
Kiran