Server 2016 Hyper-V: VMs Not Booting After Previously Working

I’m running Hyper-V on Server 2016 Datacenter, at home. I’ve created a number of Windows 10 VMs, both Pro and Enterprise. While I was creating these VMs, I didn’t run into any problems. I was able to boot into the OS, log into the computer, and configure
it as normally. However, for each one of these VMs, at some point when I tried to start the VM, I would run into SEVERE slow down issues. Often times I couldn’t get to the log on screen again. It would simply sit at the black screen with the Hyper-V logo,
while the spinning dots would go on spinning endlessly. This is a recent issue. Within the past week. I didn’t previously have this problem, but I also haven’t been using Hyper-V heavily on this install until recently. My OS is fully updated (which hopefully
isn’t the problem…).

I have made no absolutely no hardware changes and no changes to the configuration of the VMs. Usually after, restarting my computer of the VMs a few times, this issue would show up and the VM s would become unusable. Again, these VMs initially worked just fine.
They started up quickly and were very responsive.

I’ve tried creating new VMs, using different ISOs, and even uninstalling and reinstalling the Hyper-V module and management tools. All with no luck. I would really like to avoid reinstalling my host OS if that could be helped, but right now that’s all I can
think of, though I have no idea if that would even work since I don’t have a clue where the problem lies. Below my hardware and VM configuration is listed below. Any help would be greatly appreciated.


OS Name                       Microsoft Windows Server 2016 Datacenter
Version                       10.0.14393 Build 14393
System Type               x64-based PC
Processor                       Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz, 3401 Mhz, 4 Core(s), 8 Logical Processor(s)
BIOS Version/Date       American Megatrends Inc. 0301, 9/16/2011
SMBIOS Version               2.6
BIOS Mode               Legacy
BaseBoard Manufacturer   ASUSTeK Computer INC.
Platform Role               Workstation
Secure Boot State       Unsupported
Installed Physical             Memory (RAM)   16.0 GB DDR3
Total Virtual Memory       18.3 GB
Available Virtual Memory  12.5 GB
Page File Space               2.38 GB

C Drive:                          Boot Drive
Model                       INTEL SSDSA2CW120G3 (SATA SSD)
Bytes/Sector               512
Size                               111.79 GB (120,031,511,040 bytes)
Free Space               44.94 GB (48,249,929,728 bytes)

D Drive:       Location of the VMs/VHDXs
Model       ST2000DL003-9VT166 (SATA HDD)
Bytes/Sector       512
Size       1.82 TB (2,000,396,321,280 bytes)
Free Space               746.33 GB (801,364,180,992 bytes)

Virtual Machines:
Type                               Hyper-V Version 2016 Generation 2
Storage                           VHDX Dynamic
Startup                           Memory 4GB (non-Dynamic)
Virtual Processors            1
OS                                 Windows 10 Pro or Enterprise

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