Solving a problem with a different, simpler solution than the one the professor intended and having to go back and recode it the way he wanted

Now my avatar matched my life even more

Linux or Windows - still a problem for inexperienced computer users.
I was an IT professional for 35 years but haven't looked at a line of code for 10 years. And it certainly looks different today -
I have trouble using my smart Phone. I have always disliked the intimidation tehniques practised by Microsoft over the years. When
I was running OS2 in the 90's I couldn't get any software for it because MS had persuaded the developers not to release any OS2 versions until Chicago (AKA WIN95) was released. I was forced to use Windows for years until I finally decided to try Linux. Linux
is a great answer but unfortunately unless you are a current programmer there seems to be some situations that force you to maintain a version of Windows (setting up devices, Printers and developed software). Now that UEFI has been introduced as the standard in new PCs it is very difficult just to install and run Linux. So as WIN10 (the most invasive and slow running Windows to date) is the only "Valid" OS - MS is still dictating what we can and can't do. I decided to sell my new PC and pick up an old BIOS PC so that I could run linux and Win 7 to accomplish
my needs. How long can this go on? When will Linux be a "valid" Operating System. And when will a non-programmer be easily able to setup his hardware and find necessary software to run on Linux.