Using an app that tests compressed archives, the TT 2020 download file has a checksum error on the Windows 10 machine. I then downloaded the Windows file to my Mac and moved it over to the Win 10 machine with a thumb drive - no checksum error in this file. When I ran this exe file it successfully installed TT2020, but then a new problem came up. On the activation screen, TT would not accept the license code that was copied from the TT download page and also verified with the original order confirmation. Also, the TT window asking for the license code would not accept a right click on the mouse, so a copy & paste of the code would not work. I ran a full system hardware test for RAM, HD and all components on the PC, ran a full system virus scan, and re-ran the SFC test for system software. Result: no problems found anywhere. At some point I installed the Chrome browser and used it to download the TT 2020 file, which again had a checksum error. Strangely enough, the Chrome download file itself also had a checksum error but enough of this browser got installed so I could do a download. All this is very strange especially since I have done many large downloads, including Microsoft Win 10 updates, and had no problems. It's almost like something on the Windows 10 machine is selectively corrupting certain download files. So it's time to regroup and dig deeper(if possible), knowing that the TT download file is not inherently corrupt.
