I experienced "Windows 10 will not run on this PC" error due to the issue with Parallels Display Adapter (WDDM)" and have tried the solution proposed in http://kb.parallels.com/en/123053.
Windows downloaded nicely, but then i got the following error message:
There was a problem running this tool
We're not sure what happened, but we're unable to run this tool on your PC. If you continue experiencing problems, reference the error code when contacting customer support. Error code: 0x800704c8 - 0xB0003
What's next?
I'm running Parallels 10.3.0 (29227) - the latest version of 10 on a MacBook Pro Mid 2009, El Capitan 10.11.1, 8 GB RAM