It seems that second volume became active while bootmgr remains on the first partition. Please, try the following:
- Boot the Veeam Recovery Media on the affected machine
- Open cmd from Tools.
- Type in commands in the following order. Press Enter after each command
- Code: Select all
select disk 0
list part //output should look like: partition 1 – 3 GBs, Partition 2 – 80 GBs
select part 1
- Close the cmd
- Reboot the machine into regular Windows.