Summary

The Disk Defragmenter in Windows Vista is scheduled to run on every Wednesday at 1:00 AM. This article tells you how to disable the schedule (in case you've installed a third-party defragmenter), or modify the schedule accordingly.

Disk Defragmenter options

Click Start, type dfrgui.exe and press {ENTER}. When you are prompted for an administrator password or confirmation, type the password or provide confirmation. To disable defragmenter schedule, uncheck the following option:

Run on a schedule (recommended)

Click OK

In case you want to modify the defragmenter schedule, click the Modify schedule... button, and select the frequency, time in the resulting dialog.