There is definitely a bug in the product activation logic where can't deal with external USB storage correctly. I had installed Turbotax on my Windows 10 laptop and activated it a month ago. I opened the program on several occasions over the past few weeks and each time it updated Turbotax and restarted just fine. Today I connected an external 5TB USB hard disk to backup some data and when I launched Turbotax, it ran the usual updates but after the program restarted, it prompted me for an activation code. I searched the forums and found others experienced USB thumb drives causing them issues. I unplugged my USB hard disk and Turbotax no longer prompted me for activation. When I plugged it back in, the problem return. While I have a workaround for the issue, it's still annoying. Turbotax needs to include a fix in one of their frequent updates to the product.
