I've done that a lot in the past.
These days, I just uninstall crapware; but I used to do the reformat/reinstall OS route.
If you want a fresh install, repartition the disk and do a format/install. Make sure to have the files for installation of drivers handy before you do that (as it's easier to have them handy). I'd get the Intel installer for the chipset (if it is Dell -- they use Intel motherboards/chipset), the one for your graphics card, and one for your Ethernet card (if it's not built into motherboard). You can deal with sound or anything else later. Install your OS, make sure your firewall is enabled before you plug into any network, do the chipset drivers, do the graphics driver, do the Ethernet card driver, then connect up and before you do anything else at all, get the OS all patched up to whatever is current.