I installed this Hot Fix last night, after doing some research on why I got so many lag spikes playing Day of Defeat Source. On my laptop (non dual core) I never got spikes, but on my desktop (AMD X2 4400, much better components all around as well) I would get lag spikes ever 5-10 minutes, and a lot of choke from the graphics card. After playing for four hours last night after this fix, the system had zero faults, my ping improved, FPS went from 70's to 80's in the same areas, and played smooth as melted butter.
Also, my task manager showed me true processor use, instead of just the same old reports. My 3dMark scores went up 300 points, and my computer seems to be faster overall.
Here are my full desktop specs:
Windows Media Center Edition (Havnt seen someone say it worked on this yet, even though it should of by common sense, seeing as Media Center is mostly like a skin for XP)
AMD X2 4400 2.2 ghz (Sometimes I OC to 2.5, didnt while testing)
2 x 250 gb Western Digital SATA II 16mb Cache
2 Gigs (4x512mb) Patriot Memory
470 mhz Factory OC EVGA Nvidia GT7800
Arctic Freezer 64
Idle Temps @ 34 C in a 75 F room (Im not doing the math lol)