Sony PCG-C1MV - Manual (Page 49)

DVgate application notes
49
To defragment a partition
❑ Click the Start button in the Windows® taskbar.
❑ Click Programs, Accessories, System Tools, and then click Disk
Defragmenter. The Disk Defragmenter window appears.
Select the drive you want to defragment from the list, and click the Defragment
button. See Windows® Help for more information on defragmenting.
Before you begin to defragment a partition, make sure you back up all files
that you want to save.