When you are using the Windows operating system the best thing that you can do is make sure that the updates are set to automatic. That way you can be sure that they are installed in a reasonable amount of time.
If you want to make sure your network is protected to its maximum abilities then you might want to think about moving to the new Windows 8 system. But if you think that your network is fine and it is up to speed when it comes to security then you might want to wait until the next version of Windows comes out.
Your backup disk will consist of either a true backup or it will consist of a system restore. A backup disk will install an entirely new operating system on your computer. The problem with this is while it will be able to get rid of any infection that is on your computer, it will also destroy any data that is stored on the machine a swell. While sometimes this step is necessary to be able to fix the problem with your computer, sometimes it is just overkill.