Vista analyze disk

I've installed PerfectDisk for defragmentation and have unchecked run on a

schedule on the Vista Disk Defragmenter.

When I restart or do a cold boot the Vista Disk Defragmenter runs an

analysis of the disk this takes typically about 10 mins and is unnecessary

and bothersome as I have a third party product that performs this function at

4:00 AM.

I would like to disable the analysis of the disk, can this be done?

Thanks Kasey