I used Windows 10 in Parallels for more than two years and I had very good impression so far. But since yesterday Parallels keeps slowing down my system. Not only Windows 10 is unstable, but also macOS is unstable when I run Parallels. And it seems like the situation keeps getting worse. It started from a problem when I started experiencing problems with the guest Windows 10, but still managed to restart the system, but now Windows just won't start. It keeps showing the rolling logo and then stops and freezes my Mac to the point that I need to do a hard reset on the system. I need this fixed asap. Please help. I am working on both systems.