Shoutbox

I seem to have a problem running certain .exe files...

A few days ago I went to run QBasic and though it loaded fine, all of a sudden my CPU usage would jump to 100%. I checked Task Manager and found ntvdm (can't remember whether it was dll or exe) to be the culprit, and ending that task killed QBasic.

I had a brief look on the internet, but didn't find anything that helped, so I deleted the file in system32 and let Windows restore it from the dllcache, which it did. Only now however, every time i go to run QBasic, I get

"C:\Documents and Settings\Richard\Desktop\qbasic>qbasic
The system cannot find the file C:\Documents and Settings\Richard\Desktop\qbasic\QBASIC.EXE."

This also happens on a couple of Setup.exe files I've tried (very old setup files, so I'm assuming maybe its something to do with that) - when I double click them in windows explorer I get

"Windows cannot find 'D:\SETUP.EXE'. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search."

Anyone have any ideas what's gone wrong and if there is any way I can sort it?

Using XP Pro and all updates applied.

Any help appreciated