Hello
I have an original CD
That means you have a Microsoft Windows 7 disk? Or is it the Toshiba recovery disk?
Well, Microsoft disk will also work but it contains no drivers and everything you have to install step by step. The drivers you can download from Toshiba website.
In my opinion the easiest way is using HDDrecovery as Terentino described. Therefore you don’t need a disk and it’s done in few minutes.
After this you have ready to use Windows or with other words: Factory settings!