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Speed up Windows XP's defrag operations
A simple way to speed up a defrag operation in Windows XP is to
restart the system before you launch Defrag. This allows the
operating system to clear out the swap/paging file and reset it to
the default size. This lets Defrag focus strictly on the necessary
data on the hard disk, without having to stop and manage a huge swap
file loaded with unneeded data.
Another approach to speeding up a defrag operation in Windows XP is
to configure them to occur immediately upon startup. Fortunately,
you can do so easily with a simple registry edit. Follow these
steps:
1. Launch the Registry Editor (Regedit.exe).
2. Go to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\RunOnce.

3. Right-click the Run Once sub key and select New | String Value.
4. Name the value Defrag and press [Enter] twice.
5. Type Defrag.exe c: /f in the Value Data text box, and click
OK.
6. Close the Registry Editor and restart Windows.
The defrag operation will begin when you type in your password and
press [Enter]. (Keep in mind that values added to the Run Once key
are removed immediately after the command has been run.)