I'm working on company that gives consulting for VMware platforms. We have different versions on our customers from ESXi/vCenter 6.5 to 7u2 and all of them up to latest package(including VMTools). This issue started 1 month ago i don't know why but randomly 1 or 2 (for now it has been total 9 VMs with this problem) Windows 2012 R2 or 2016 Server crashes and doesn't boot up until i disable "Driver Signature Enforcement" or reinstall VMTools. I checked the logs for VMTools and Application/System Logs but there is no error. Is there a known issue about this? VMTools cause this problem but is it from Windows Updates?