I have a xps 15z laptop recently i installed windows 10 but then try to put it back to windows 7 but something went wrong and had to reinstall to factory mode but accidentally inserted a wrong disk that did not belong to dell it was a compaq installation disk and it damaged my laptop when i installed the dell installation disk it asked for the product key but since i had the laptop since 2011 it rubbed off i cant do nothing with my laptop i cant even get online no internet connection
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