We bought recovery-disks.com set of dvd's to get our office computer back up and running. We ended up having to install the hard drive first and then install these discs. It was a fairly easy process and didn't cause us any downtime. Luckily, the installation took a couple hours and was very easy to do via the included instructions. I did have a small hiccup with the discs, as I thought they didn't send the correct discs. But, once we followed the directions, they installed perfectly fine and there were no issues. I highly recommend these discs are anyone in need of getting their computer installed back to factory specifications with little to no downtime. Also, if you don't see the set on the website, be sure to call them to order it over the phone. I know it doesn't say how to exactly but trust me, you can easily just call their number and explain the problem. They were able to place my order, no questions.