On one of our Win2k boxes we are constantly getting 100% CPU Usage, and
program taking up maximum CPU Usage is DLLHOST.EXE

Does anyone have any idea as to why this is happening ?

Well DLLHOST.exe is one of the files that IIS uses...

So you probably won't be able to to kill that proccess.

Well first try a restart. It may be a run-away script somewhere, dllhost is also used by MS Transaction server (I think thats the name) and also MSQL... So alot of possibilities there.

If that doesn't work get MS Updates to see if you've missed one.

If that doesn't work... Fresh re-install?..

If that doesn't work... Animal sacrafice?

If that doesn't work... Learn to love penguins.

Most times, you have a loop in a script on your web server. Are you running your sites in our out of process?