I had this problem on my Dell tablet running windows 10 32 bit. If you have a mouse plugged in before opening DOSBox it works. But to cut to the chase, one bright spark (not me) found that replacing the sdl.dll file in the DOSBox directory with sdl.dll version 1.2.11.0 the problem is solved …

Very Handy thread, - I have just loaded it onto a couple of PC's at home, Both Win XP, both nvidia card and used the july 2003 patch for CH2000 (would not work without that). Now ready to race my lad! My higher spec PC has updated nvidia drivers and I do get some flashing between screens loading. So …