Your PC, if its a pentium 4 and a hand-me-down, is very likely to be single core.
A single core PC can only handle on process at a time. For every process after the first, your computer switches back and forth between them so quickly that it looks like it is doing multiple things at once.
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\spoolsv.exe
Crucial windows files, ignore.
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\System32\Ati2evxx.exe
This is likely your GPU driver, but the fact that there are two makes me suspicious. I suggest getting these processes scanned.
C:\WINDOWS\Explorer.EXE
Explorer is the program that you use on the PC that is part of windows that lets you look at the files on your hard drive or optical drives or whatever. Its an essential part, although you can replace it with other software if you really want to. I don't like it, but most people prefer it due to being already used to it. I use Directory Opus.
C:\Program Files\Java\j2re1.4.2_03\bin\jusched.exe
Updates your Java, utterly pointless for most people.
C:\windows\system\hpsysdrv.exe
HP system thing that basically makes your computer that knows it is an HP. Almost utterly useless, unless you use online tech-support. It logs how many times you have done system recovery, as well, for who knows what reason. I say kill it.
C:\WINDOWS\System32\hphmon05.exe
HP process that helps you use your media card readers with the HP Photosmart stuff. If you don't need that, kill it.
C:\HP\KBD\KBD.EXE
HP program, lets you use the programmable keys on your Logitech multimedia keyboard. If you don't have one, kill this.
C:\Program Files\InterVideo\Common\bin\WinCinemaMgr.exe
Allows you to use an IR remote to watch TV on your pc, lets windows know that there is a DVD in the computer (but it is not at all required to play DVDs). For the most part, completely useless.
C:\Program Files\Common Files\InterVideo\SchSvr\SchSvr.exe
Windows DVR program, only useful if you use it.
C:\Program Files\Multimedia Card Reader\shwicon2k.exe
Driver for your 7-in-1 card reader. Thats all it does, kill it if you don't use the card readers or don't have it.
C:\WINDOWS\ALCXMNTR.EXE
Sound driver, leave it alone if you like sound. It also tracks what you do and sends it back to RealTek... but I guess you gotta take the good with the bad.
C:\Program Files\Adobe\Photoshop Album Starter Edition\3.0\Apps\apdproxy.exe
Completely pointless unless you use Adobe Album Starter to interface with a camera.
C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe
C:\PROGRA~1\Grisoft\AVG7\avgcc.exe
C:\Program Files\QuickTime\qttask.exe
This just manages Quicktime and is completely unnecessary. Waste of RAM.
C:\Program Files\Logitech\Video\LogiTray.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\PROGRA~1\Sony\SONICS~1\SsAAD.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\WINDOWS\System32\LVComS.exe
C:\PROGRA~1\Grisoft\AVG7\avgamsvr.exe
C:\PROGRA~1\Grisoft\AVG7\avgupsvc.exe
C:\PROGRA~1\Grisoft\AVG7\avgemc.exe
C:\WINDOWS\System32\Tablet.exe
This is your Wacom tablet driver, its needed to use the device. If you don't have one and don't plan to get one, I suggest just getting rid of this.
C:\WINDOWS\System32\wuauclt.exe
This is the process that manages automatic updates in Windows. If you don't want those on (I hate them), I can explain to you how to get rid of them.
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
This is just HijackThis cuz it was running, ignore it.
This is the list of your processes, that is all the stuff that is running at once. As a general rule, you want AS FEW of those running at any given time as possible. The more, the slower. Also, they take up space in your RAM. It's also worth mentioning that ANY of these can be a stealth virus that is using a common file name to go unnoticed. Scan them all. (google is your friend!)
...okay, I halfway did that I suppose.
I'ma go take a nap and finish that when I get back.