Here is an update on this issue, on one client, Windows 7 I had to copy the Sage 2013 install programs to the c:\ of the workstation I was on. Deleted any previuosly installed or partially installed E-file. Installed E-file then dowloaded and updated the MAS90.exe update from Sage, open E-File in Period End, ran the Update Process which then informed me that I need to install C++, vredist_86.exe. In the end sucessfull, just a few steps :)