We had three Windows XP high end DELL laptops, two WIN 7 laptops and two WIN8.1 laptops... Had to put he WIN XP machines off to the side and upgraded all of the others when WINs sent me the go date...
Everything except the WIN 7 machines went without issues. We had to take Win 7 machines back to their original setups and after that they updated to WIN10 just fine.
The only problems I have noticed here on WIN 8.1 machines is the SHUTDOWN procedure has changed from the beginning upgarde where I can not completely SHUTDOWN with just mouse clicking the word shutdown from the ystem page. To completely shutdown I have to open the lid and press the START BUTTON for a few seconds...
My LAPTOPs have always been operated in DOCKING MODE running multiple monitors, with external keyboards and other USB external connection items... Only open the laptop lids to startup, then close the lid once I get to the login page...
The new WIN10 OS has been screaming for me ever since... My WIN8.1 Laptops all boot to the login screen in less than one minute now...
I am still running my MS OFFICE 2007 software including OUTLOOK. The only program I lost was one of my AUTOCAD lookalike CAD program LIBRA OFFICE which was sort of a MS VISIO lookalike where I did alot of drawings and such. I am just now thinking about update to a LIBRA OFFICE Ver 5.1 that runs on WIN10 or perhaps move to something called SMARTDRAW...
I still have a ton of thing left on the WIN XP PRO High end DELL laptops and not sure what I can do with them... All of the really important things where backup on external USB hard drives and are available for WIN 10 so all is not lost. I just had alot of external programs for my other hobby like Ham Radio and Family Tree research haha...
I still let the MS UPGRADEs do their thing...
I still have many USB external Hard drives with many photos and other important PRFs work and hobby related than can easily accessed and updated as external drives when connected...
My RV trailers both use the external monitor screens, keyboard, mouse, sound, and other USB connections (including WIFI printer). This allows me to grab my laptop and hit the road. Everything goes with me on trips more or less and only takes about 5 minutes to setup...
When I am on my HAM Radio alerts I am using the dual 24-inch monitors like here at the house. Kinda of impressive sitting on a hard board back in the unused tent bed on my OFF-ROAD POPUP setup...
So far so good and pleased with WIN 10. I do operate it in WIN 7 mode however - Could not even think about using all of the OPEN WINDOWS. My screen is very familiar to me with the tool bar across the bottom and a few ICON down the left side of the screen and my favorite night scenes doing their screen saver mode.. When friends come by they always say "I thought you was running WIN 10 !!!'
Roy Ken