I have a problem where DOSBox closes on start-up just after displaying the Orange logo screen. There is no error and nothing different from a successful start up in stdout.txt or stderr.txt.

I'm running version 7.3 and the problem has come up on two different computers(detailed below) and I've tried all the different output types. I've tried reinstalling DOSBox but it still crashes, and the same thing happens in Megabuild 5.

Any help would be appreciated.

Computers
1 (used to work)
Windows Vista 64bit
ATI HD3400 - tried two different drivers (latest Catalyst and Asus's)
2GB RAM, Asus nVidia motherboard (can't tell more from here)

2 (first time trying it)
Windows XP SP3
On-board Intel graphics
2GB RAM, Intel P4 (again all I can tell remotely)