If you don't want the bloated HP Recovery run from its partition or the Recovery Disks, then find a Windows 7 retail installation DVD for your version to clean reinstall with Product Key on COA sticker:
Reinstalling Windows 7
Otherwise here is how to run HP Recovery from partition or Disks:
HP Backup and Recovery Manager
You own the copy of Windows 7 which came on with your computer for the life of the machine, to reinstall any way you please. A Clean reinstall without the bloatware and useless factory utilities which have better versions built into Windows 7 is a vastly superior install, especially with HP's.