Running Windows Server 2003 with SP1 - have shadow copy scheduled to run weekly on Friday nights. It is a compressed drive, but that should not matter. Every week it updates the schedule to the next week, but nothing else. There has not been a shadow copy generated since it was scheduled many weeks ago (other than the manually generated one that is). There are no error messages in the event viewer at the scheduled shadow copy run time. When I run 'vssadmin list writers' all writers report Stable No error.