Well, dannyboy950 -- all my old programs work in Win10. I needed DOSbox to run my DOS programs like Lotus 1-2-3 for Dos (version 2.01), but Lotus 9.8.2 for Windows worked okay, so did MS Office 2003 Professional, TuneUp (which is updated for Win10, so maybe I shouldn't count it), etc. Common old programs. The only hassle I have yet is finding a video onscreen recording program that works, and I've not yet tried to install Bibleworks 9 on it, to see if it can handle the mss facsimilies. But it should be okay. Firefox, VLC, MS Works (I think), ZtreeWin and all my other programs which work in Win7 and XP, work in Win10 64-bit. Which frankly surprises me. This is the first time I've ever been comfortable running 64-bit Windows.
Now, folks have reported problems with Visio and a wide variety of other programs, particularly anti-virus and backup (I didn't test Macrium Reflect Free with Win10, nor EaseUS nor Acronis). Windows says it doesn't want any other anti-malware but its own on Win10 (I forget where I read that in the MS documentation, but I think it's also in Settings for protection, but you should be able to Google). So maybe that's why.
Edge is awful, IE doesn't work at all, but Firefox and presumably Chrome, work just fine. I got rid of the ads by disabling search to include the web, and took our own BC's Rocky Bennett's genius suggestion to make Google my home page for Edge to get rid of the ads there.
My results are based on build 10240 which activated mid-July, with updates for about a week after that. I stopped using Win10 then. Seems like the download version everyone not Insider got, is very different, for the problems reported are quite strange and varied. For example, I could immediately clean install to a new partition, but the download version requires you first overwrite your existing Windows before you are allowed to do a clean install -- which historically, is a sure-fire way to bork your installation (though it might work, the results are unpredictable). So in short, my results might be very atypical, since I used an Insider build which clearly was more 'clean'.
Does this info help? Yell at me if not, and I'll try to do better.
Edited by brainout, 19 September 2015 - 09:28 PM.