"This system does not support fullscreen mode"
 

I have downloaded a couple of games I first played on the Amiga many years ago. Have tried running them on a fairly new laptop with Windows Vista but get a message headed '16 bit MS DOS Subsystem' which says "This system does not support fullscreen mode. Choose Close to exit the application". Is there a way around this please?

Dosbox, and as you have to ask you'll need some instructions:
http://www.abandonia.com/vbullet/forumdisplay.php?f=90

Very Instructional Video
[ed]
You could also try running it in windowed mode...
http://www.abandonia.com/vbullet/showthread.php?t=14902