You might want to save a Windows 7 backup image so you have a path back if Factory Recovery should fail. Make a Windows 7 Repair CD so you can boot in to apply the image if necessary. System Repair Disc - Create Backup Complete Computer - Create an Image Backup
Many tech enthusiasts eventually
find a clean-copy DVD of their OS version and reinstall using the OEM Product Key on the COA sticker on machine. Any retail installer can also have all versions unlocked: Windows 7 Universal Installation Disc - Create
When ready, make your Recovery Disks and a Backup image so you have a path back to factory condition or your current state.
The installer is mostly driver-complete, with newer arriving quickly via optional Windows Updates. Any drivers then missing in Device Manager can be found on the Support Downloads webpage for your model computer or device.
Install updates and then programs slowly over time to gauge performance after each. Don't let any programs write themselves into msconfig>Startup as they become freeloaders on your RAM/CPU and can spy on you. I only allow AV and gadgets. http://www.sevenforums.com/crashes-d...-msconfig.html
Use a lightweight free AV like MS Security Essentials which works perfectly with Windows 7 Firewall. http://www.microsoft.com/security_essentials/
When it is finished, clean and order the HD perfectly using state-of-the-art free CCleaner then Auslogics Disk and Registry defraggers monthly.
Then save a Windows 7 Backup image externally so you never have to reinstall again, just reimage the HD or replacement using DVD or Repair CD.