Windows 7: reinstalling preinstalled win7

I have a Acer Aspire M5810 it came with windows 7 preinstalled. Now my computer is a mess and I want to format and make a fresh install, but i didn't get a windows 7 setup disk when I bought the computer, I just got 3 blank DVDs and I have no idea what I'm supposed to do with them. Can anyone please instruct me? I'm gonna need some idiot proof step by step instructions. Thanks

The computer probably has a recovery partition, down load and burn this recovery CD and wait for instructions, from somebody/guru who knows what to do. I have to take my cat to the vet and fix a friends computer so I will be off line for a while. Download Windows 7 System Recovery Discs — The NeoSmart Files

They provide the DVD's so you can burn a Recovery Disk set. Follow instructions in your set-up literature or Manual which you can find on the Support Downloads webpage for your model computer.

Many tech enthusiasts prefer to find a clean-copy installer for their version so they can install Windows 7 without the factory bloatware. As long as you use the same version, it will active with the Product Key on your COA sticker. However if you have any favorite Acer apps, they will not be included unless you can find them on the Support Downloads webpage for your model.