Vm backup failling with snapshot error (156)An error occurred while saving the snapshot: Failed to quiesce the virtual machine.

 How to block Running  windows network diagnostics in Microsoft Edge Browser

disable 2 windows service as below.

then also do the below registry key.

To disable running Windows Network Diagnostics in Microsoft Edge browser using the registry, you can follow these steps:

1. Open Registry Editor: Press Win + R, type regedit, and hit Enter.
2. Navigate to the Microsoft Edge Registry Key: Go to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge If the Edge key doesn't exist, you may need to create it.
3. Create a New DWORD Value: Right-click on an empty space in the right pane, select "New" > "DWORD (32-bit) Value".
4. Name the DWORD: Name it as AllowNetworkDiagnostics.
5. Set the Value: Double-click on AllowNetworkDiagnostics and set its value to 0 to disable Windows Network Diagnostics.
6. Close Registry Editor: After making the changes, close the Registry Editor.

Once you've done this, Windows Network Diagnostics should be disabled in Microsoft Edge browser. If you ever want to enable it again, you can either delete the AllowNetworkDiagnostics DWORD or set its value to 1 or delete the AllowNetworkDiagnostics entry, depending on your preference. Remember to always be cautious when making changes to the registry, as incorrect changes can cause system issues.