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#21
If you connected two computers via ethernet cable, then a conflict between the two likely created the hang.
This is why a crossover cable is suggested to connect between two machines.
Even when an ethernet cable will work for data transfer between two machines, there are often issues similar to yours as well as networking anomalies that require close management.
Check your Event Viewer and Performance logs at the time to see if errors are revealed which can be remedied to resolve the issue.