>>I don't recommend an update. Instead I recommend that you buy a brand new SSD as boot drive, and install Win10 and all the necessary programs from scratch. You can reconnect the old boot drive after Win10 is completely installed, but reconfigure it as another volume, like O: (for old).
>
>The upgrade is required for corporate procedures.
>
>Thanks

Reminds me of how I described the process of upgrading a computer from Windows 3.0 to 3.1 -- it took 15 minutes and 4 hours. It was only 15 minutes to complete once I'd ironed out what was causing it to crash (a process that took me about 4 hours -- eventually tracked the crash to driver incompatibility, and the key was to switch all the drivers to generic versions *before* starting the upgrade).
Might be a good idea to image the harddisk before attempting an "in-place" upgrade --- at least this affords you the ability to "roll back" the changes if something goes wrong (in worst case, a failed upgrade results in a computer that simply won't boot).
Aside from avoiding the potential driver compatibility headaches, a clean install also gives you an opportunity to get rid of any "residue" left over from any software previously installed (e.g. antivirus and antivirus software is often notorious for not always uninstalling cleanly and not uncommon to leave behind stuff that's prone to give you headaches later on).