An PPA upgrade should take around 5 minutes.
Download Upgrade ISO
Download the latest EFI enabled ISO to your Hyper V host machine:
Power Off Virtual Machine
If the virtual machine is in a powered on state, right-click it and select Shut Down...:
Wait for the virtual machine to shut down.
Alternatively, from the console type
Select New ISO
Right click the virtual machine and select Settings...:
Toggle SCSI Controller in the Hardware pane and select DVD Drive:
In the DVD Drive pane, click the Browse button under Media and select the previously downloaded EFI enabled PPA ISO.
Click Apply and then Ok.
Power On Virtual Machine
Right-click the virtual machine and select Start:
PPA will now boot and apply any database migrations automatically.
After a few minutes the new version of PPA will be available. Check the version label on the login screen to confirm.