Well, I made the plunge and upgraded from Win 7 to Win 10. Let me share my experience....
The upgrade went pretty smoothly, actually. All my hardware worked, I was able to get online, run all my programs, and it retained all my settings/passwords from the previous OS.
One of the things I've noticed (other than the "where are the setting options for this" nonsense), is that certain settings do not run properly if you have specific services disabled.
For example, I use ERUNT to make a registry backup at every startup. In Win 7, this worked flawlessly. However, once upgraded, I would get an error when this program ran of "Access Denied". After googling, I found a solution that worked....I had to change a policy setting in the registry that had something like: "EnableLUA"=dword:00000000.
However, I'm now unable to open any of the apps...it states: "This app can't open" and that I can't use the built-in Administrator account and to log-in under a different user. WTF? I fix one problem (with ERUNT) and create another?
Also, when I try and open Windows Store, it flashes open for 1/2 a second and then closes immediately.
These above issues are common to many users....I just don't get it. MS is aggressively pushing this OS on us in a desperate manner and putting all their profits on this Golden Goose. But they make these stupid security changes that cause more problems then they solve.
I've also had a problem with the latest Win 10 build when I was asked to install it through Windows update. It would attempt to download the update but would immediately error out with error 0x800706b9. Upon further investigation, the cause of this error was the fact that the Windows Firewall was disabled. Well, DUH....I use Comodo firewall instead and have turned Win Firewall off and disabled the service....REALLY??? TURNING OFF THE NATIVE FIREWALL CAUSES WINDOWS UPDATE TO FAIL???
So far, I'm not that impressed with Win 10. I don't get it when MS decides to hide system settings or remove the ability to customize certain settings that were readily available in Win 7 or earlier.
Not sure what the consensus is out there on this "state of the art" operating system, but IMHO, if Microsoft continues their arrogant attitude on telling us "we know what is best for you and you don't", they will forever struggle trying to win people over with their latest and greatest offerings.
Finally, if anyone has any ideas on how to fix my above issues, your input would surely be welcome.