Bob - what TDF said. You just have too much loaded on the C: drive. There will be some items that can be moved but you will need to load everything new on another drive. A 2-2.5 y.o. server should be sufficient for your current needs. Might need more physical memory or disk space but the core server should be fine. Like TDF said, Manufacture & model #...
It is not good to run any system volume out of disk space so don't load up anymore on it. With that said, don't delete anything unless you are beyond absolutely sure you can.
As for new drive, just buying a hard drive might not work. Hopefully there is some kind of redundant SCSI system in there that has not been fully utilized. Runing down to CompHell & buying a drive is probably not what you would want to do.
Also, and I'm being very sincere when I say this, if there is anything at all of substance on that server you need a full backup system and restore proceedure in place. If/When the system pukes, anything on there could be gone or perhaps still recovereable at exorbitant fees. You guys need some sort of backup.
Want to know the funny thing - I applied to be the IT guy for NESPIN but never even got a call back
