Your laptop was supplied with Windows7 Home Premium already installed, why do you need the product key? The product key on the underside of the laptop is only for the installation of Windows 7 that came with the laptop.
If you have removed the pre-loaded Windows installation and installed your own copy, then there is a good chance that your Windows7 Product Key will not work, as that is an OEM product key.
and the installation of MICROSOFT OFFICE on your Acer laptop is designed to stop working after 25 uses because it is a TRIAL. It is not the fully licenced version of the software, and if you want to use it any more you must BUY a licence from Microsoft or your local retailer.
Also you probably have a trial version of an anti-virus program running as well that will time out at some future date. Don’t pay for the anti-virus program, uninstall it and install Microsoft Security Essentials instead.
lol....my appologies girl...i didn't mean it...huhu...sorry sis.,...^_^....n yeah every laptop purchased should be already installed Win 7 home premium, n that should be Genuine....maybe what you meant was microsoft office.....^_^