Regularly defragging files one your hard drive is one way that you can optimize and improve the performance of your computer. However, when you defrag your files, the boot files are not included.

In order to make sure that your system continues to start as fast as possible, you should verify that your computer is defragging the boot files on start up. A boot defragment puts the boot files as close together as possible, making startup time faster.

By default, your system should be configured to defrag boot files on startup. You can verify that this setting is enabled in the registry using the following steps:

1. Click Start and click Run.

2. Type regedit.exe and click OK.
3. Navigate to the following registry key:
   
   HKEY_LOCAL_MACHINE \ Software \ Microsoft \ Dfrg \ BootOptimizeFunction

4. In the right pane, check that the Enable string has a value of “Y”. Otherwise, complete the next step.
5. Double click Enable.
6. In the Value data field, type “Y” and click OK.
7. Close the Registry Editor.