I've been trying to install TT Premium for 24 hours now. It hangs on "Preparing Installation".
I read that it could be an issue caused by Windows Update, and I just got done going through 'heck' with that, attempting a system restore, and nearly trashing the whole installation. Considered buying a new PC when things went south, but then I'd have to buy MS Office AGAIN, etc. That'd be about $2000 I don't want to spend.
I tried both the disk and the download - nada. Tried changing the resolution (down from 3840x2160) - nope.
I ended up installing it on my laptop - took about 30 seconds.
Fortunately, my desktop PC recovered from this debacle; fingers crossed that there's no residual damage. I guess I'll do taxes on my laptop this year!
