Thanks for the update - I run WinXP on my gaming system (Core i7 920, 24GB RAM, 2 x 580GTX graphics) and was concerned at its omission from the system requirements.
As for those wondering why I and others are sticking with WinXP:
Lower memory/CPU usage (typically 200-500MB less than Win7);
More configurable thanks to XPLite and nLite - Win7 has 7Lite, 8 has nowt;
Windows Product Activation can be more easily "managed";
Easier to secure (using software like Process Guard and System Safety Monitor - neither available now but no equivalent exists for Win 7+, nor likely to due to MS' restrictions on kernel modification on 64-bit systems);
No GUI disasters like TIFKAM - XP's UI changes are generally a downside compared to Win2K but are almost all optional;
Supports old hardware (the Microsoft Force Feedback 2 joystick and Microsoft Strategic Commander gamepad won't work on 64-bit systems);
No 64-bit stupidity like requiring separate Program Files folders for 32 and 64 bit applications or storing 64-bit code in Windows\System32 while having 32-bit code in Windows\SysWOW64
Some issues are due to (Microsoft's kludgy implementation of) a 64-bit OS, but running (and paying for) a 32-bit version of Win8 seems to be asking for insult on top of injury. A switch to Linux would make more sense but there's very little in the way of application-aware firewall software which I would consider essential for online security (the closest would be TuxGuardian which has not been updated since 2006 and doesn't really offer the security options available from Windows products like Outpost or Look'n'Stop).
Uh, I hate to point out what should be obvious, but with 24GBs of ram you don't need to worry about it... The most I'm aware of any game in history requiring is 8GB's at the absolute. 98% of computer games in existence use < 4GBs of ram. Besides, if you are running 32-bit Windows XP you can only address 3GBs of it--so you are *wasting* 21GBs of ram, if you are being honest and not just "cute" with your remarks. Seriously, guy, with hardware like yours running XP makes as much sense as you telling me you are booting up from MS-DOS every day... (Run DOSbox--that makes much more sense than sticking with XP.)
Get real, guy. There are *no* "advantages" to running XP as your primary OS. Hang it up--that's a losing sentiment. Compared to Win8.x/10 today (and Win10 would be *free* for you had you been sensible and updated to Win7 years ago!), Win XP is a Swiss-cheese smorgasboard of security holes, exploits and malware...and Microsoft is no longer doing security patches for it. WinXP is Dead, guy... Go ahead, here's a hanky, have a good cry--and grab yourself a cheap copy of Win8.1 Pro (I paid Microsoft $40 direct for mine) so that you can upgrade to Win10 x64 later this year when it ships, for free...! I bought Win 8.0 for $39.99 from Microsoft, and because I did I got Win8.1 for free, and I'll get Win10x64 for free, too. Look, this *game* cost me more than Win8 Pro cost me, and Win10 will cost nothing if you are smart enough to upgrade.
Frankly, if you don't upgrade your OS you might as well just pitch out most of your hardware because it's useless.