If the drum is not turning but the computer has not faulted, the belt is off or broken. The grinding noise is not a good sign - has the machine been getting noisier on spin recently? This can be a sign of drum bearing failure, which can throw the belt off. If this is the case, the belt is the least of your problems!
It's worth popping the back off and having a look - power off, of course. The belt should just wind on if intact, but look for brown stain marks as well.
If you're unsure how to proceed, click the link below for a UKW engineer in your area.
Which bit of "Unplug it" is causing the problem?
Stop eMailing me. This is a perfectly good forum - use it!