This is good news. Now we have to do the following steps:
1. as marsmimar says, you need an anti virus program. Chances are there is a 3 month trial version that came with the installation disk. That has to be uninstalled first with a special uninstaller before installing MSE (which is a good free option from Microsoft)
if there is a 3 month trial, it is most likely Norton (Symantec) or McAfee. Please check that and let us know which one it is so we can give you the correct uninstaller. Uninstalling with the usual windows uninstaller will not do. We then can proceed with MSE.
2. It is unlikely that you have to install any drivers because they usually come automatically - unless you have some very special devices. If any, let us know.
3. There will be a lot of updates coming from Microsoft. Install those but if you see SP1, do not install that together with any other updates. That works best when installed alone. Whenever you see the yellow shield on top of the Sleep/Shutdown button in the start menu, go first to Control Panel\System and Security\Windows Update and inspect the updates before you install them. Then install them from there and not from the Sleep/Shutdown button. And as I said, if you see SP1 with a bunch of other updates, select all the others first and install those. Then proceed with SP1.
4. Imaging - I would take an image of the system asap and then whenever you have accomplished a major step. Define an "Images" folder on your external disk and image with Macrium. Here is my
video tutorial which will explain how to use it. But do not forget the first step which is to burn the Macrium recovery CD (that contains a little Linux program which can restore the image(s)). That CD you will need in the event that you have to restore to an image. Then define your image as explained storing it to your Images folder on the external. Once defined, you later only have to highlight the XML file and click on the cog wheel - and off it goes.
If you encounter any difficulties or have any questions, let me know. And
do not use the Windows7 native imaging facility. It is a real dog and guaranteed to get you into trouble.
5. There are some other things that would be useful to do like weeding out your startup programs and moving your data to a seperate data partition. But those we can discuss once you are done with the above.