Unless you're bound and determined to do an upgrade install (I strongly recommend against it), you can do a clean install of W10 using your W7 product key.
Historically, upgrade installs have many more problems than clean installs - so most techs suggest avoiding them like the plague.
Also, if the upgrade install does work, it's usually more difficult to fix any problems related to the upgrade - causing technicians to frequently suggest wiping the system and clean installing W10
Next, the success of an upgrade install is usually related to how well-used the old Windows installation was. The longer/more used it was, the less likely it is to be trouble free.
And finally, in the event that you choose to revert to W7 (within 30 days), it's highly possible that the revert won't work - and you won't be able to recover the installation - so then you're stuck with a clean install of W7
So, first, make sure that you've saved the product key, that you have recovery media for W7 (in case you want to go back), and that you've backed up any data that you want to save.
Then use this link to make DVD or USB drive install media:
If, after the clean install, you have problems or there are unknown devices in Device Manager, post back and we can help fix that up also.
Edited by usasma, 15 March 2016 - 07:03 AM.
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