HP 421 Notebook-PC - Manual (Page 9)

Disposing of a used battery ............................................................................................... 70
Replacing the battery ......................................................................................................... 70
Testing an AC adapter ....................................................................................................................... 71
Shutting down the computer ............................................................................................................... 71
6 Drives ............................................................................................................................................................. 73
Identifying installed drives .................................................................................................................. 73
Handling drives ................................................................................................................................... 73
Improving hard drive performance ..................................................................................................... 75
Using Disk Defragmenter ................................................................................................... 75
Using Disk Cleanup ........................................................................................................... 75
Using external drives .......................................................................................................................... 76
Using optional external devices ......................................................................................... 76
Replacing the hard drive .................................................................................................................... 77
7 External devices ............................................................................................................................................ 81
Using a USB device ........................................................................................................................... 81
Connecting a USB device .................................................................................................. 81
Stopping and removing a USB device ............................................................................... 81
Using USB legacy support ................................................................................................. 82
Using external drives .......................................................................................................................... 83
Using optional external devices ......................................................................................... 83
8 External media cards .................................................................................................................................... 84
Using Media Card Reader cards ........................................................................................................ 84
Inserting a digital card ........................................................................................................ 84
Removing a digital card ..................................................................................................... 85
Using ExpressCards (select models only) .......................................................................................... 86
Configuring an ExpressCard .............................................................................................. 86
Inserting an ExpressCard .................................................................................................. 86
Stopping and removing an ExpressCard ........................................................................... 87
9 Memory modules .......................................................................................................................................... 89
Adding or replacing a memory module in the expansion memory module slot .................................. 90
Upgrading a memory module in the primary memory module slot ..................................................... 94
10 Security ........................................................................................................................................................ 98
Protecting the computer ..................................................................................................................... 98
Using passwords ................................................................................................................................ 99
Setting passwords in Windows .......................................................................................... 99
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