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In a bid to prevent piracy of their Windows

operating system, Microsoft requires you to enter a unique product key and validation of Windows installations through the Windows network. If you do not do this, your copy of Windows may not work properly and you will not have access to all of the features that Windows has to offer.

Your Windows product key is the verification string Microsoft uses to validate your Windows operating system copy. The key is checked each time you update the operating system on your computer. If

you buy a new Windows copy or your key is not valid, you can reset the product key in the system information screen. Before you reset the key, you must purchase a valid Windows product key for your operating system.

Windows 7 is available in several different versions, each of which includes different features

targeted at different types of users. Windows 7 Home Premium is ideal for the typical computer user and her home computer. However, Home Premium does not include every feature that Windows 7 has to offer. If you find that some tasks exist that you can't perform with Home Premium, you may want to upgrade to Windows 7 Ultimate. Microsoft includes a feature in Windows 7 Home Premium that makes upgrading a simple task.

A locked keyboard is a real hassle. Producing either odd characters and numbers or no response at all (no matter how many keys you mash), a locked keyboard prevents you from anything on your computer. While fixes vary from brand to brand and situation to situation, there are a number of approaches you can take to unlocking the keyboard on your notebook without having to call an expert.

In Microsoft Windows operating systems such as Windows 7, Vista and XP, a calculator is included in the installation. This calculator, while somewhat basic in its functions, allows users to do their math operations directly from their computers. The default way for people to use this calculator is by clicking on the screen, but the keyboard is also an option. Unfortunately, in most laptops there is no key dedicated to multiplication. But there is a simple way to use the "Shift" key to make a multiplication key work on a laptop..