You could try running Windows XP on a Virtual Machine for 2.3 servers and setting ACPI on it because, well, everyone else probably is running at light speed.
If you really, really want to use XP that is. I would not recommend installing XP any more over your current operating system. Windows 7/8 will probably be best for future C# servers, from tests I've done so far.
Nothing wrong with Windows 8 tbh. Just a more optimized version of Windows 7, but looks **** visually - which is why you set it back to windows 7 look