Hi,
I installed windows 8.1 pro on my Acer Aspire 5750 laptop and activated with the product key, which i received with my purchase. Everything was working fine earlier, till i decided to go for a re-partition of my 500GB HDD. A system crash occurred whilst the partition was on process. After that incident, "Missing operating system" message showed up.
So, i decided to go for a re-installation of the windows using a USB bootable disk. When i am trying to enter my product key, it shows " This product key didn't work. Please check it and try again". Can you please help me out with this issue??
Thanks
