man, before you start copying your restore file just do one thing: check the lenght of the executable file "DOSBox.exe" and note it down. then, restore your file and check the lenght of the "DOSBox.exe" again. if you get a diferent lenght, you have a virus that appends to the executable file.
also note that even if you if get the same file lenght for both files, you will probably still have a virus - you have all the sinthoms of that - one of these that replace the code of the executable file by its own code, eventualy resulting in damaging the file.
sugestion: run a good anti-virus program with updated virus definitions; if you don' t know which one to choose, maybe this topic can help you a little:
http://www.abandonia.com/forum/index.php?showtopic=6637
if you can' t get an anti-virus program right now, maybe you should try a
"online scan"
PS: guys, someone has to help this fellow, he thinks he has discovered "gunpowder" :whistle: