I personally experienced that, after upgrading windows 10 has many technical issues, but there's no issue being used iso for clean installation. I recommend you to install new OS and activate using product license activation key, which can be bought from ODosta Store Their customer support is ver...
Windows 7 support is over, but there's no doubt, As Windows 7 is the most recommended OS, Which through user can do almost all work without any problem, Where I recommend you to activate your OS being purchased its license code from ODosta Store After OS activation, You can easily get windows 10 ...