My experience with Prepar3D within Win 10 was not too bad with the exception of erratic to unusable opperation of some GoFlight Modules, most notably the Gf-166 modules. Despite applying all known fixes supplied by Rob A and Steve from Pollypot Software, I was never able to obtain reliable operation of some of these devices...Extremely frustrating after a Win 10 Pro clean install and an extensive Prepar3D addon and aircraft install.
Now after a Win 10 delete and a clean reinstall of Win 7, along with all of the many P3D addons, all is well with P3Dv3 and GoFlight. I am one happy camper again and will stay with Win 7 till the day I die! .......Age 81 and counting......Hopefully, Win 7 will out live me!