guest os crushes

Hi! The last few weeks have begun to observe problems with the addition of the VirtIO (Paravirtualized) network interface in the win 2019 guest system in live mode. When we add a new interface, bluescreen is called in the guest system and the system restarts. After restarting the system, guest...

Good Evening! There is VM 100 : guest os - Windows Server 2008 standard, with 2 HDD (sata and virtio). Boot partition SATA, Data partithion - virtio. Host pve-manager - 3.4.1, kernel 2.6.32-37-pve. There is a yesterday's backup of VM 100. When I restore VM100 from backup first it starts...