I have Win7 Professional (64 bit) with Virtual Machine and XP Mode installed. I am trying to run some old DOS programs like Quick Basic V4.5. I have tried running it under normal Win7, XP Mode and DOS Prompt in both normal Win7 and XP Mode. I keep getting the error message that "this file (program) is not compatible with the version of Windows you are running". Is there any work-around for this problem? Would installing Win7 Professional (32 bit) solve this problem? Note, these programs run OK on my 5 year old Compaq Presario V2000 laptop which is running on the "real" Win XP.