Hello, I have the C51 version 5 compiler. However we upgraded our computers and tried to install the program on a new computer with XP professional operating system. During the fisrt step in the compilation there is the message "no dongle found:. The dongle medic regodnizes the dongle as being a pro dongle. I have also downloaded the a new driver from the rainbow site. The dongle is still not regodnized. Please help me out. Best regards Gottfried
Happily using Keil in a "dongle free country" I can not be specific. I recall clearly that there are posts in this forum about installing some kind of dongle recognition software when upgrading to some Windows versions. Find out what (search) and try that first. Erik
Of course, you also need to be a little more specific with the type of machine you are trying to run the dongle on (as I fell foul of last year with my Toshiba laptop). (hint: Toshiba laptops require a special dongle driver to run)