03-28-2008, 08:07 PM
Hi, Gordon! Hi, Dr_Davenstein! If it isn't the 64 bit thing, could it be a TSR program gunning in the background and grabbing memory locations that QBasic needs for graphics (all SCREENs except SCREEN 0), but is now not allowed to access? If interested, post again, and I'll go into some explanations of what to do.
Ralph, using QuickBASIC 4.5 and Windows XP Home Edition and Service Pack 2, with HP LaserJet 4L printer.