Source games crashe due to "shaderapidx9.dll"

[CroutonsofDeath{RD}]

Hey. I've been having this problem since earlier today. Left4Dead crashes on start due to "shaderapidx9.dll" I ran DxDiag and it says that that DLL is just fine. I tested a few other games including F.E.A.R. 2, TF2, FarCry 2, Fallout 3 etc... and all of them worked except TF2. Only source games are crashing because of this. Didn't happen until today.

Computer Specs:

Modified Dell Dimenxion 8300
512 mb Radeon x1650 pro
3 gb memory
Sound Blaster Audigy 2 Value
3.2 ghz Pentium 4
Windows XP
Latest updates, service packs, and drivers installed.

 

[Atten]

Do you have AIM installed? Its recent update screws with source.

Also try running TF2 at dx8 using the '-dxlevel 81' in the advanced start commands box.

 

[e MpTy]

Are you running xfire? if so try shutting down xfire, I have found that zfire causes problems sometimes.

If not, then you could just try reinstalling directx, well more like overwritting it again.

If all eles fails, re-install steam or repair.

 

[CroutonsofDeath{RD}]

I do not use ANY messenger program. I've reinstalled steam and all my games, hasn't helped. Reinstalling DirectX didn't help. Setting it to directx 8 using that command made my entire computer crash.

 

[skoutzykola]

ya dont have dif programs that run with the games like aim and xfire run while your playing it

 

[Atten]

I'd blame your drivers. I'm not familiar with ATI drivers, but I know nvidia drivers have been laying down some pain when it comes to Source games recently (mostly fixed in 182 series). Try going back to an older driver.

 

[CroutonsofDeath{RD}]

I'd blame your drivers. I'm not familiar with ATI drivers, but I know nvidia drivers have been laying down some pain when it comes to Source games recently (mostly fixed in 182 series). Try going back to an older driver.

I attempted this, didn't work either however I found out the problem.

I made a bit of a dumb mistake awhile back and ignored a little warning about a keylogger infecting a program I really needed to run. The keylogger led to other viruses, and I finally dusted off my scanner and ran a thorough check of all my memory and windows directories and I had over 300 different trojans, loggers, malware, and viruses. I had to reformat everything but it seemed to fix it..... (Makes note to rememebr what a "Keylogger" is. I didn't know what it was until after I had used it....