Undo a downgrade from windows 8.1 to 8

Rebeccak-15

Reputable
Jul 9, 2015
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I downgraded from windows 8.1 to 8 and lost my Microsoft office 2007 and all other programmes such as avast security etc. is there anyway I can revert back to windows 8.1 and get back all of the programmes I lost? I.E undo the downgrade