Are you happy with Windows 10 Pro?

Also Steakster,
Did you do a Clean Install or just did an upgrade?
I suggest, if possible, do a Clean Install. That way all the bloatware is gone and you will see a huge improvement in performance. Make sure your have the "keys" for all your softwares before you do a clean install. Also take a backup of your "My Document" folder. Create a directory on the C:\ and put the files there, because My Document gets wiped off, but the new folder on the C:\ will remains, even if you do Clean install.

It doesn't matter if you do a clean install, the bloatware is still there. The only way to get a true clean install is to buy a retail copy of Windows. If you use anything supplied by whoever makes the computer, you get the bloatware along with the OS. The only option is to manually uninstall anything you don't want.

Steakster, assuming as I would expect that Windows 10 has a task manager function (which is taskmgr.exe in Windows 7), open it and under the "processes" tab see what process or processes have high CPU utilization percentages indicated. If the fan is running full speed all the time chances are it means that some process is imposing a heavy workload on the CPU.

Regarding doing a clean install of Windows 10, until the feature described in the "Device Activation Improvements" paragraph which appears about 2/3 of the way down on this page is officially released (which I don't think has happened yet) Windows 7 activation keys will not work for purposes of activating Windows 10. Although, apparently, once the free upgrade from 7 to 10 is performed on a given computer, and 10 is activated on that computer over the Internet, 10 can THEN be cleanly installed on that computer, and it will activate with no key required.

Also, after upgrading be sure to go through the privacy-related settings in 10, and change the default settings as described in many articles that can be found on the web. A lot of those settings are, um, objectionable, including one which allows Microsoft to use your computer to distribute patches and updates to other computers via the Internet.

Regards,
-- Al

ZD, good point, but I believe that clean installation media can be created by downloading Windows 10 via this page. And if 7 has already been upgraded to 10 and 10 has been activated on the particular machine, per my comments above installing from that medium should make possible a true clean install.

At least, I think so :-)

Best regards,
-- Al

P.S: See the section toward the bottom of this page entitled "How to perform a clean installation of Windows," which appears to confirm my previous comments. See particularly the note below item 5.

Regards,
-- Al