Adding a Legacy Network Adapter within the virtual machine settings can resolve the timeout / performance issues during the bare metal restore.
To add the legacy network adapter take the following steps:
1) Open Hyper-V manager
2) Right click the virtual machine being used for the bare metal restore and click settings
3) Click Add Hardware and choose Legacy Network Adapter (as illustrated in the below screeshot)
4) Remove the previous default adapter and boot the amended VM with the AppAssure boot iso file.