We purchased a new laptop running Windows 10 (64 bit) for the QB Desktop 2021 program and want to use it to run our 7 companies (A/P and A/R only). Since we were previously using QB desktop Pro 2009, we updated our company files.

For some reason, 6 files opened fine yesterday (was working on the 7th file but ran out of time) and I tried to open a few of the same companies today (didn’t try the other files) and received a window stating "Problem Connecting to Server Error -6123,0 message....and to complete the File doctor or make sure the server is setup for the qb database manager.  For the largest file that I couldn't open at 311KB (I can open it in QB2009, but a month ago I had performance issues, running slow which prompted us to go to QB Desktop 2021), I started the File Doctor (check your file option), but, it ran for 26 hours and said "this could take a few minutes....Repairing your file". I stopped the function this morning since I had to transport the laptop to work. Should I have let it go longer?

To confirm, this is NOT connected to a network or internet, but a stand-alone workstation. The program is on the hard-drive and qbw files all reside on the desktop of the laptop. As ALDREN18 (QB Team) noted on the post dated 10-11-24, the correct option I should be using is SERVER vs workstation.  Do you think that I chose the incorrect terminology when I was setting up the program/files?  Bottom line, I can’t open any of the updated 2021 files.  Thought this upgrade process was supposed to seamless but, what are your thoughts/comments? Thanks.