My name is Jocelle and thought I would contribute on what helped for me on my game problems on windows XP .. okay.. I was having problems installing the sims and whatever else games saying that some kinda error about DOS.. so I clicked on this link I found through a website and it fixes all corrupt windows xp.. here is the discriptions.. Hope it works for you all :-)
This installaton program will reinstall the missing or corrupt Windows XP system files command.com, autoexec.nt and config.nt. The absence or corruption of one or more of these files causes a "16 Bit Subsystem" error.
We recommend that you download this file and save it to your desktop or to another location where you can find it. Double click on the file to run it once it's downloaded. If problem reoccurs in the future, simply re-run this program.