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Windows 7 home prem serial number issue
Hi
I hope you can help with a recent issue thats shown itself. I bought a used Acer Aspire 5542 laptop months ago running Win 7 home prem with all the latest updates and everything running fine. A few days ago a message popped up telling me the serial number was invalid although there is the COA on the underside of the laptop. On a suggestion from a friend I ran Belarc Advisor to find out the code installed, it showed the two numbers were different. What Im assuming is the hdd has crashed/been upgraded, and replaced with a dodgy copy of Windows, or Ive been scammed.
Where do I stand on this, can I replace the dodgy no. with the real one, download a beta and use the coa, or am I stuck with having to buy a new Windows disc?
Thanks in advance
Ray