I had this same issue which is very annoying. In my case I already had TT 2020 installed and running fine. I only bumped into this issue when I went to do one final online update before filing the final return. The updater function bombed out with a MS installer error and when I tried to download the manual update from TT site, that's where I got tripped up with this memory message. I called TT support phone and their only response was my computer was too old.
Anyway, my workaround was to uninstall TT, then re-install from CD. (I'm old school and like the "security" of having the CD on hand). After re-install TT launched fine as expected, I did the online update which also worked fine, and all is well. The tax file I had been working on was intact, including the fact that I had already paid for the state return filing. I was able to complete the file transmit. I wish I didn't have to piss away so many hours struggling to make it work.
I hope this might help someone.
Cheers!
