Super High 'CPU Usage' Help pls

Hi, Ill say the situation.

-First off im getting 100% CPU Usage, on desktop... wtf... but heres a little brief of whats up-

My Main PC broke, so i got some parts fixed. But kept the main parts, like Mobo, Harddrive, Power Supply... but my gfx (powercolor 9800 pro) broke, so i got rid of that.

SO i made a new computer out of old bits, not using any of these ones. and bought myself a nice new 9800 pro Atlantis - sapphire.

Then, i got my stuff back from my main PC, and decided to rebuild my main PC. I put in this new 9800 pro, had some usul problems, like Hardrive installing, XP, and the usual blue screen of death sh!t.

But i fixed that, got into XP, installed some games, drivers -Sound, GFX (new ATI ones) SP1+1a / 2 and standard drivers.

But on my game World Of warcraft, i 'Tried' to play... i was getting 1fps.. and it isnt net lag, its graphics lag. I know this gfx card is good, and is working, as it was in my other pc, and running nicely and quickly. I cant find anythign else to do. Done reinstalling game, and drivers, and .net... previous drivers, driver cleaner...

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ill list my processes, theres nothing wrong with what im seeing...

Explorer.exe - 15k
Firefox.exe -24k
isafe.exe -7k
Isass.exe -1k
Services.exe -3k
Smss.exe -.3k
Soundman.exe -2k
Spoolsv.exe -5k
Svchost.exe -5k
Svchost.exe -3k
Svchost.exe -4k
Svchost.exe -8k
ctfmon.exe -2k
csrss.exe -3k
system -.2k
System Idle Process .02k
vsmon.exe (Zonealarm btw) -15k
Winlogon.exe -.8k
Zlclient.exe -3k

---86% CPU Usage

Pysical Memory(K)
-Total 1048052
- Available 807640
-System Cache 529088




--- When i first built this PC, i was barely getting over 30% cpu usage on games... and wtf... need help, otherwise im gunna reinstall, / chuck this out the Window... then Kill Bill gates, and buy a Mac