Index_U

U

undoing changes

data-recovery software for, 437

for stability, 220

uninstalling

applications, 212–213, 213

devices, 150–151, 150

in troubleshooting, 143–144

uninterruptible power supplies (UPSs), 276, 276

types of, 277

warranties for, 277, 458

Universal Serial Bus (USB) ports and devices

advantages of, 43

hard drives, 39

keyboards, 171

for performance, 307–308

purpose of, 44

Unknown Devices, 234–237, 235–236

unstable software, damage from, 318

updating

devices, 151

network drivers, 362

virus-scanning software, 85

Windows Update for

removing, 224, 225

for stabilizing operating systems, 221–222

turning off, 222–223, 224

upgrades, 3, 192

BIOS, 194–195

operation of, 195–197, 196

problems in, 197–198, 198, 208

removing, 198

memory, 199

installing, 199–200

memory types in, 202–204, 203–204

rearranging, 201–202

troubleshooting, 200–204, 203–204

motherboard, 204–206

operating system, 206–207

performance expectations for, 290

problems in, 207–209

risk limiting in, 192

UPSs (uninterruptible power supplies), 276

types of, 277

warranties for, 277, 458

USB (Universal Serial Bus) ports and devices

advantages of, 43

hard drives, 39

keyboards, 171

for performance, 307–308

purpose of, 44

User Accounts window, 78–79, 78–79

user-input devices

connections for, 41, 42

disasters related to, 42–43

utilities

compatibility of, 65

damage from, 317–319

for PC recovery resource kits, 105–106