Getting a Perfect Clean Reinstall of Factory OEM
Many tech enthusiasts 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 by extracting the ISO using ImgBurn, then run the
ei.cfg removal tool, burn an all-versions DVD or write ISO to flash stick using
this tool.
Back up your files externally, make your Recovery Disks so you have a path back to factory condition, or
save a Backup Image of the entire HD first. Run an audit of installed hardware and software including keys using
Belarc Advisor. Gather your program installers.
Boot the Windows 7 installer, choose Custom Install, then Drive Options (Advanced) to Delete all partitions not needed, following illustrated steps given here:
Clean Install Windows 7.
The installer is mostly driver-complete, with newer arriving quickly via optional Windows Updates. Just in case, have your Wireless driver on flash stick or CD so you can install it and get online quickly. Then
enable hardware driver auto-updating and check for optional Updates repeatedly.
Any drivers still missing in Device Manager can be found on the Support Downloads webpage for your model computer or device.
Driver Install - Device Manager
Install updates and then programs slowly over time to gauge performance changes after each. Don't let any programs besides AV and gadgets write themselves into msconfig>Startup as they slow startup, become freeloaders on your RAM/CPU and can spy on you.
Startup Programs - Change
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 Disk and Registry tabs, then Puran boot-time defragger + full Disk Check after adding Intelligent Optimizer on Additional Operations tab:
CCleaner - Free software downloads and software reviews - CNET Download.com
http://download.cnet.com/Puran-Defra...-75115626.html
Finally save a Windows 7 Backup image externally so you never have to reinstall again, just reimage the HD (or replacement) using DVD/Repair CD with the stored image.
Backup Complete Computer - Create an Image Backup
Special note to HP owners: HP Recovery will now do a Minimized OS Reimage when booting from F11 which retains only the OS, Recovery Manager, HP Support Ass't, and HP Wireless LAN. This is as close to a clean reinstall as you can get without using a retail DVD with COA key. If you clean reinstall only to C and leave all other partitions intact, F11 Recovery will still work later if you need it. You can extract HP apps and utilities from Recov Disks using this:
Extract HP 3rd Party Software from RecovCD. Backup C:SWsetup and C:Windows/System32/Drivers to browse after install for any missing drivers or software.