Disable Automatic Disk Defragmentation in Vista with dfrgui

By default Windows Vista will automatically defrag your hard drive (defrag: reorder files on the physical hard disk and not to make them easily accessible / re-organising your file cabinets).
The default is that Vista itself schedules the best time for this to do, while this could decrease real-time performance it might be better if you choose when to defrag yourself. An easy way to disable this scheduled defragmentation is as follows.

1) Click START, type dfrgui and hit ENTER. (see figure 1)

Figure 1: Start the Vista Disk Defragmenter

2) Then uncheck Run on a schedule (see figure 2) and click OK.

Figure 2: Uncheck Run on a schedule

Note: While the above is a lot faster :) you can also do this by browsing to Control Panel, System and Maintenance, choose Defragment your harddrive.