Question about Toshiba Satellite A135-S4527 Notebook

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Invalid product key Windows Vista Home Premium with Toshiba

I purchased a Toshiba Satellite A135-S4527 last year at Compu USA in Hawaii and I tried to use the Windows Vista Home Premium that came with the Toshiba, but the product key keeps showing an invalid message. Compu USA has closed since. What can I do?

Thanks, Lori

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  • Ryan Stiers
    Ryan Stiers May 11, 2010

    Have you reinstalled Vista? Did you reinstall Vista Home Premium with the Disks that came with the Toshiba Laptop, or another copy of Vista? That key is only good with the copy of Vista that came with the computer. Does it ask for the key right when you boot into Windows Vista?

    Or are you trying to use the Microsoft Office program that came with the computer and that is asking for the product key? Becuase the copy of Microsoft Office that comes with the computer is only a trial version and after the trial is over it wants a valid purchased licence key to keep using it.

  • Roberta Smith
    Roberta Smith May 11, 2010

    first... is that the key on the sticker on the bottom of that laptop... if so check that you have the key written down exactly as it appears... if that still doesn't work... contact customer service at

  • Anonymous Mar 15, 2014

    have tried several times
    antivirus plus by mcafee


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This could be because someone took the license key that was origionally installed on your computer, did you lent it out? The same product key can not be activated on 2 computers unless it has multiple licenses. I had this problem, but i simply called microsoft and they shut down the other product key and gave me a new one for free.

Posted on Feb 25, 2009

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