I have bought an Acer 5740 laptop that comes with Windows 7 Home Premium. When I install using eRecovery, it installs the Windows and is automatically activated, but it installs a lot of other software that I do not need. So I decided to download Windows 7 Home Premium image and install it using the CD key supplied with the laptop (on the back), but when I try to activate it it says "The Windows 7 Home Premium key you typed is invalid for activation" and it gives me an option to activate using the automated phone system.
I wanted to know why can't I activate it? Does this mean someone else might have activated it? Or is it because of the copy of Windows that comes in the hidden partition? I have also read in one forum that you have to buy a Windows CD from Acer. Please advise.