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
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