Similar problem. Briefly, We migrated the Lansweeper box to a VM, which went OK. Then upgraded Lansweeper (3.1) to premium and had server performance issues. The old server had been cleaned off and I decided to go back to the physical server. Ran the 3.2 installed, which went well. Now I am getting 95% The RPC server is unavailable. (Exception from HRESULT: 0x800706BA) errors. Before going back to the physical server this wasn't a problem.
Any ideas?