If you "just got a new Dell laptop" why did you reinstall or feel the need to install? If there is some Dell download that fixes or adds something that applies to your specific installation then do the update, otherwise the old adage "if it ain't broke, don't fix it". I do a lot of support on the Dell forum and see a lot of problems caused by users udating when it wasn't really needed (especially the BIOS as a failed BIOS update and a corrupted BIOS and the only option on a Dell is to replace the motherboard).
You also have to be careful with non-Dell drivers, due to Dell's custom implementation of a lot of hardware. For example I've seen a lot of posts of people trying different sound drivers trying to get the System Mixer function that is not on some models and in most cases the non-Dell drivers will either not install or the sound, including the audio input and output ports, will not work correctly.
If you need to reinstall, the Dell recovery partition on the hard drive, accessed by F8 (for Vista and Win 7 systems) at power on will allow you to restore the PC to the original factory condition.