2. Replace the 4 screws (2) to secure the hard drive.
3. Replace the battery (see Inserting or removing the battery on page 32) and the service door (see
Removing or replacing the service door on page 43).
4. Turn the computer right-side up, and then reconnect AC power and external devices to the
computer.
5. Turn on the computer.
Improving hard drive performance
Using Disk Defragmenter
As you use your computer over time, the files on the hard drive become fragmented. A fragmented
drive means data on your drive is not contiguous (sequential) and, because of this, the hard drive
works harder to locate files, thus slowing down the computer. Disk Defragmenter consolidates (or
physically reorganizes) the fragmented files and folders on the hard drive so that the system can run
more efficiently.
NOTE: It is not necessary to run Disk Defragmenter on solid-state drives.
After you start Disk Defragmenter, it works without supervision. However, depending on the size of
your hard drive and the number of fragmented files, Disk Defragmenter may take more than an hour
to complete.
HP recommends defragmenting your hard drive at least once a month. You may set Disk
Defragmenter to run on a monthly schedule, but you can defragment your computer manually at any
time.
46 Chapter 8 Drives
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