Hi everyone, Are you having constant spikes in the Editor when you try and play a scene? Does your performance sometimes get good, and then get terrible again. Does the profiler return spikes ever second whenever you play. Does it slow to a crawl? It has nothing to do with your Vive or VR. That is a result of overuse CPU by the stupid Windows Anti-Malware system. It thinks Unity is malware! You must either disable realtime anti-malware protection or add Unity.exe to the list of exclusions in your Windows Defender settings. To add it to the list (since windows will turn on the real time protection even if you turn it off, thanks windows), you have to go to Windows Defender Settings > Opening Windows Defender Security Center > Virus and Threat Protection > Virus & threat protection settings > scroll to the bottom > Add or Remove Exclusions > + Add an Exclusion > Process > Unity.exe. Yes it tiakes 3 lines to get to this setting. The reason the spikes are so bad is because windows defender will hog the CPU. Because the CPU is being hogged, the CPU will miss sending info to the GPU and have to wait till the next scene to send the info again. But now the physics is freaking out because it didn't render, so now it does the physics twice. OH NO, the physics took longer and now the CPU missed the scene again. This cascades to terrible frame rates till the anti malware looks at Unity sees it isn't even running and stops caring. This destroyed my productivity for weeks and I had no idea why. I hope this helps you out.