Oops. I discovered it's actually a 3.2 gHz Celeron. Don't know where I got 1.6 from - might have been thinking of my old laptop.
Anyway, here's some computer info:
Processor: Celeron 3.2 gHz
HDD: 47.8 GB free of 74.9 GB
Anti-virus: Avast!
Firewall: Windows Firewall
Anti-Malware/Anti-Spyware: Windows Defender and Malwarebytes
Contents of procexp.txt:
Process PID CPU Description Company Name Command Line
System Idle Process 0 98.44
Interrupts n/a Hardware Interrupts
DPCs n/a Deferred Procedure Calls
System 4
smss.exe 428
csrss.exe 496
wininit.exe 540
services.exe 624
svchost.exe 808
mobsync.exe 3780 Microsoft Sync Center Microsoft Corporation C:\Windows\System32\mobsync.exe -Embedding
igfxsrvc.exe 1180 igfxsrvc Module Intel Corporation C:\Windows\system32\igfxsrvc.exe -Embedding
unsecapp.exe 3224 Sink to receive asynchronous callbacks for WMI client application Microsoft Corporation C:\Windows\system32\wbem\unsecapp.exe -Embedding
WmiPrvSE.exe 436
hpqbam08.exe 3276 HP CUE Alert Popup Window Objects Hewlett-Packard Co. "C:\Program Files\HP\Digital Imaging\bin\hpqbam08.exe" -Embedding
svchost.exe 880
svchost.exe 912
svchost.exe 980
audiodg.exe 1168
svchost.exe 1080
dwm.exe 1592 Desktop Window Manager Microsoft Corporation "C:\Windows\system32\Dwm.exe"
WUDFHost.exe 2512
svchost.exe 1092
taskeng.exe 1968 Task Scheduler Engine Microsoft Corporation taskeng.exe {C1ABF6F8-2673-49C0-8FD8-E4104788F43B}
taskeng.exe 3120
wuauclt.exe 1732 Windows Update Automatic Updates Microsoft Corporation "C:\Windows\system32\wuauclt.exe"
SLsvc.exe 1200
svchost.exe 1228
svchost.exe 1392
aswUpdSv.exe 1632
ashServ.exe 1664
spoolsv.exe 1952
svchost.exe 1996
agrsmsvc.exe 1640
AppleMobileDeviceService.exe 1440
mDNSResponder.exe 1408
svchost.exe 1736
svchost.exe 1000
McSACore.exe 304
rundll32.exe 2116
svchost.exe 2072
NMSAccessU.exe 2108
svchost.exe 2160
svchost.exe 2184
svchost.exe 2220
svchost.exe 2264
SearchIndexer.exe 2304
SearchProtocolHost.exe 5264
SearchFilterHost.exe 5588
ashMaiSv.exe 3612
ashWebSv.exe 3792
wmpnetwk.exe 2892
iPodService.exe 3172
svchost.exe 3472
lsass.exe 644
lsm.exe 652
csrss.exe 548
winlogon.exe 596
explorer.exe 1652 Windows Explorer Microsoft Corporation C:\Windows\Explorer.EXE
MSASCui.exe 3744 Windows Defender User Interface Microsoft Corporation "C:\Program Files\Windows Defender\MSASCui.exe" -hide
ashDisp.exe 3752 avast! service GUI component ALWIL Software "C:\Program Files\Alwil Software\Avast4\ashDisp.exe"
hpwuSchd2.exe 3800 Hewlett-Packard Product Assistant Hewlett-Packard Co. "C:\Program Files\HP\HP Software Update\hpwuSchd2.exe"
hkcmd.exe 3848 hkcmd Module Intel Corporation "C:\Windows\System32\hkcmd.exe"
igfxpers.exe 3864 persistence Module Intel Corporation "C:\Windows\System32\igfxpers.exe"
RtHDVCpl.exe 3956 HD Audio Control Panel Realtek Semiconductor "C:\Windows\RtHDVCpl.exe"
iTunesHelper.exe 4000 iTunesHelper Module Apple Inc. "C:\Program Files\iTunes\iTunesHelper.exe"
hpqtra08.exe 4036 HP Digital Imaging Monitor Hewlett-Packard Co. "C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe"
hpqste08.exe 2936 HP CUE Status Root Hewlett-Packard Co. "C:\Program Files\HP\Digital Imaging\bin\hpqSTE08.exe" -CtxID "#Hewlett-Packard#HP PSC 1400 series#1211690043" -Startup
wmpnscfg.exe 2492 Windows Media Player Network Sharing Service Configuration Application Microsoft Corporation "C:\Program Files\Windows Media Player\wmpnscfg.exe"
procexp.exe 5476 1.56 Sysinternals Process Explorer Sysinternals - www.sysinternals.com "C:\Users\Public\Downloads\ProcessExplorer\procexp.exe"
It's not bogging down as badly today as it has been, which leads me to believe it might be something to do with Vista SP2, but if I knew, I wouldn't be asking you guys.
Thanks for your help.