The Myriad Pro family is quite large, with 12 individual fonts. It comes with Adobe's Creative Suite and I'm currently running version 5.0 on Mac. I simply copied the fonts from the Mac through the network to the PC and installed them in the usual way, and they work fine in PowerPoint and other packages. I've checked the font lists by comparing the Windows Fonts control panel and the PW Fonts list (for text rather than headings), and most show up, including those shown in the Windows CP as 'Hidden', but just two others are missing from the PW list - MS Serif Regular and Terminal. I don't know what this indicates, but it may be relevant. I may try installing some Google Fonts to see if they are better than the Adobe ones as they're more likely to be cross-platform compatible perhaps.
I don't understand about registering fonts for PW so presume it's something you have to do within the app itself to make them show up. If this is the case don't worry, I can use something else.