depends on what your discs are, also your system. Most systems now come with recovery rather than OS discs.These are on the hard drive with an option to creat a set of discs
If the recovery disks are a full return to factory setings. ( this excludes anything you have installed, or saved after that) there should be no problem. Just follow the instructions in your manual.
Some systems ( early Medions were one ) you not only had a recovary disc you also had a basic XP disc. There recovary sometins a support and application CD used the partion on the Hard dive
So try and see and if no luck post the make and Model of the system and details of what discs you have.