Horble...you have a couple of issues going there.
Most obvious is your Windows service pack level...which also points to possible missing critical updates.
Only 1 gigabyte of RAM.
Also your paging file is huge...take almost half of the amount of RAM you have installed...that means there are some real memory hog processes running when they shouldn't be.
What happens when you delete hires pak and drop your textures to 512?
Any custom sound files?
Can you post the sound card info from your dxdiag?
Using a mixed bag of custom sounds for AH.
Sound card info here:
-------------
Sound Devices
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Description: SoundMAX HD Audio
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: HDAUDIO\FUNC_01&VEN_11D4&DEV_198B&SUBSYS_104381F6&REV_1003
Manufacturer ID: 65535
Product ID: 65535
Type: WDM
Driver Name: ADIHdAud.sys
Driver Version: 5.10.0001.6520 (English)
Driver Attributes: Final Retail
WHQL Logo'd: n/a
Date and Size: 7/10/2008 18:22:10, 334336 bytes
Other Files:
Driver Provider: AnalogDevices
HW Accel Level: Full
Cap Flags: 0x0
Min/Max Sample Rate: 0, 0
Static/Strm HW Mix Bufs: 0, 0
Static/Strm HW 3D Bufs: 0, 0
HW Memory: 0
Voice Management: Yes
EAX(tm) 2.0 Listen/Src: Yes, Yes
I3DL2(tm) Listen/Src: Yes, Yes
Sensaura(tm) ZoomFX(tm): Yes
Registry: OK
Sound Test Result: Not run
I upgraded to Service Pack 3.
Don't know why it says I only have 1 GB of RAM, pretty damn sure I've got 2 GB. Gonna crack 'er open and try to figure out what's wrong (probably got a stick of buggered RAM), or atleast which one doesn't work.