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Clean re installing Windows 7
Hi
I have problems with one of my PC after the recent Windows 10 upgrade and having several issues occurring intermittently (can't browse internet. Internet / WiFi connection gets disconnected time to time) and prefer to reinstall Windows 7 on this PC until windows 10 becomes stable.. The computer originally came with a Windows 7 . Can I do a clean re-install of Windows 7 (I have the product key on the sticker on the machine) from a DVD .
Just wanted to get some advice whether re-installing Windows 7 will not make the computer unusable ?. Is there anything else that I should check or be mindful before doing the clean re-install.
Appreciate an advice