Jonathan Thanks for your efforts. Went to 20.04.11 and things work perfectly. Amazing that such trivial things can have such far reaching consequences. My previous remark about Paul Lee was just a reference to his post where he said that he was using Windows 98 and DOS for his Fractint work. Tim has plugged DosBox. I gave it a try and it seemed to work OK but the rate that Microsoft changes Windows makes me reluctant to switch to it. I used to like DR DOS better than MSDOS. As I remember some disk drive company acquired it and immediately junked it. Never understood why. With a couple of improvements DOS would be a great program. What would be great is making file names just a little longer. Eight characters is rather too short. Fractints allowing long PAR file names isn't much help when the GIF files get cut down to eight. One small change to Fractint that would make me happy would be when a picture is loaded to have it's name put into the X screen file name. I know it's easy to change but remembering to do it every time is difficult. I don't know how many duplicate FRACTxxx.gif files I have and every time I try to get them organized things quickly bog down. In my original program the naming I used was xxxXyyyZ. Where xxx was first three significant digits of real coordinate. X was a letter for Fractal type. All I ever got to use was M,J, and D, D for Dragon. And yyy for imaginary coordinate. Leaving 36 choices to distinguish individual pictures. These days that system would fill up pretty fast. Charles