My techie says 10 reduced the amount of memory used over 7 but 11 took it all back and then some. Lightning came thru a printer and killed my Win 7 machine. I had a new SSD in it so, I built an all new machine with 10, and added the old SSD. So, I have dual hard disks. But it has been helluva mess to migrate over, reload passwords and especially reloading the software I use. I simply was not able to reload two critical programs. WordPerfect would not load graphics from file...and I think not it was a MS problem. So I ordered newest version of WP (2021) and got it this morning. Loaded but could not open it - got an error about some dll file that is part of C++. After getting my other techie (not the guy who built the machine) out for a look - $ee... he ran repair upon a couple of MS CC++ executable files. Finally got it running about 4 pm...and got rid of that anti-virus virus - Avast. Even while the 30-minute uninstall was taking place, it was blocking downloads.
Add to that this little PITA Win 10 cannot recognize half the video formats out there. You gotta get those codex' from the MS store. And, of course, I edited video with Windows Movie Maker - no longer can do.
Adobe - used all my downloads so losing the computer did not allow me to uninstall back to the disc therefore, is lost...and 9 etc. are too old for them to update. Now I've tried Shampoo and pdf 10 and frankly they are simply not Acrobat. They suck. So, another $400 and a new copy of AA is on its way. In all this disaster has cost me close to $3,000.