cpu demand

I've been humming along with the above version of parallels with every version of Mojave prior to the new release of 10.14.4. Now my Windows10 setup is effectively crippled. Long bootup, apps crawling, CPU flatlined at 100% much of the time. I'm running Windows 10 Pro 10.0.17134 on a Macbook...

My host operating system is OS X 11.6 El Capitan. I have tried installing a Mac Snow Leopard Server guest into Parallels Desktop Lite, but no matter how I configure it, if two CPU cores are allocated to the guest OS, they are both at 100% all the time when the guest is running - Activity Monitor...