Any system which can run Windows 7, can also definitely run Windows 10.
Just try for clean installation; i.e. back up (cut / paste, copy / paste) your data in external, portable hard drive and remove it, make boot-able USB Drive or DVD (Windows 10 Official, untouched download links: here but would be needing activation. Choose the one which suits, and matches hardware requirements), format hard disk completely, make partitions, install Windows, and soon as the installation completes, activate it (I can share activation patch / link details, but not here publicly), install all the latest drivers (you must have the drivers with you before hand), install anti-malware software and after that, you are good to go! 