windows 8.1 OEM on overclockers.co.uk pc can you upgrade to windows 8.1 pro the retail version

SegaCollector

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Feb 11, 2015
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I bought a pc at overclockers.co.uk and it came with windows 8.1 OEM not the retail version, my question is can you upgrade to windows 8.1 pro the retail version if you have windows 8.1 OEM on first