Pretty much, but bear in mind if its the partition with the OS installed, you may not be able to simply do that. If the partition you want to deal with is your C: drive (which is usually the default Windows label for the drive with the OS) then the way to go about formatting it is to use your Windows installation disc, or your computer's recovery discs. When you re-install Windows it will ask you if you wish to do an advanced install, and then present you with partitioning/format options.
Before even considering doing that though, make certain that you have installation files for the device drivers that your computer needs. There is nothing more frustrating than trying to connect to the internet to download a network card driver that you cant download because you have no appropriate network card driver installed. Formatting your primary partition/disk is a bit of a nuclear option because it will be up to you to get the OS back on the computer, not to mention configuring it too. If you have system recovery disks (usually manufacturer supplied with the laptop) the process is usually simpler though.