MS-DOS will not run. Weird error message.

[Seven Force]

Anytime I run a DOS program like Visine or Hexposure I get this message:

http://img.photobucket.com/albums/v292/SevenForce/error.bmp

I don't know what to do here because it's never happened before. Can you guys help me? If it helps, i'm running XP. :(

[executioneer]

http://support.microsoft.com/?kbid=324767

[Seven Force]

Followed it step by step. I'm still getting the message.

Damnit. :(

[Seven Force]

DOS will run, but these programs won't.

[executioneer]

virus?

[Seven Force]

I don't think so, my virus scanner (Norton Anti-Virus) would've picked it up.

[executioneer]

when did it start doing this

[executioneer]

and if you can get msdos to run, why don't you just run those programs FROM dos :/

[Seven Force]

I don't know. I really don't. I just get the error message when I try. I just got it today, but I don't think i've ran any DOS-based programs in a while.