Should I upgrade to Win 10?

msny said:

Windows 10 is a departure from all previous versions where MS is trying to please
everyone with phones, tablets and computers. Thus there are compromises especially
in display and such.

Once you get that, and decide to go to W10 I highly suggest you back up your
files and do a clean install. Your chances of success I believe are much better.

If you select to custom install you can turn off 99% of stuff MS collects.
https://fix10.isleaked.com/

You can disable cortana.
Cortana - Enable or Disable in Windows 10 - Windows 10 Forums

Check out the tutorial section in the forum to further customise your setup.
Windows 10 Tutorials

When you install skip the part that asks you about setting up an MS account, its
not required.

If you do all this basically your install will be similar to Windows 7. No doubt there
would be some work to do, but if your happy with windows 7 stay with it.

What do you mean chances of success? Cant I just have both OS's? download 10 (obviously purge from all the useless/big brother crap) and then I can switch back to Win7 whenever I want.
Oh an what about an MS Office? can I use my 2007 one? its my preferred version since it does not lag or take 20 minutes to load up like the latest versions. (seriously why the hell do they take so long to pop up)
@Vince Massi Lol no thanks.

Eidius, you have thirty days to go back to Windows 7. After that, you can't go back. I have upgraded four of my computers to 10, and only one had a minor problem.

Any programs in Win 7 that won't run in 10 will not survive the upgrade.