no. PC, as in "personal computer", was introduced on August 12, 1981, and had since its introduction an MS-DOS system: http://inventors.about.com/library/weekly/aa033099.htm the IBM PC had an architecture with standard components, which allowed many companies to copy it, making the PC the computer everyone knows today. Microsoft had just the luck to be there. They didn't give any direction, the market did. And CPM didn't evolve to Windows. MS-DOS, which was a copy of CPM, bought by Microsoft, did.