It’s not a Windows issue outright, it’s a priority issue. If you have mental ray set to use all available cores/resources, it’s doing its best to do just that. You can set the Affinity for an application to use fewer cores as opposed to lowering the priority in TaskMan, for example. I’m still using Win7 myself (no plans to change that) and I have no issues with
It’s a Windows issue. My 4-core OS X laptop can render with Maya and comp in Nuke comfortably at the same time without dropping priorities. But my HP Z820 can’t do the same in Windows that’s why it’s running Linux.
CGBeige has a massive bias against Windows and never really took the time to learn it, thus his sardonic remarks. Of course, you could spend thousands of dollars and try his "solution".
My gaming rig runs Windows 7 and I’m plenty familiar with Windows, from NT 4 all the way up to 7 and I review Windows VMs for Ars Technica, so get your bullshit straight:
And Linux is free, so the solution won’t cost anything if you want an OS that can multitask properly.