My buddy who has a Toshiba laptop got a thing on his computer saying to upgrade to Windows 10.He told me that he said no to it but it upgraded his computer anyways and he lost some files and stuff on his computer and he cant find it.So my question is when the laptop upgraded to Windows 10 would it wipe out files from his computer or did it store it somewhere.He hates the upgrade to Windows 10 and I'm not a computer expert.Any help would be great on this and thanks in advice.