There is no doubt that Microsoft’s latest innovation, Windows 7, has made a great impact because of its enhanced GUI, handy features and great performance. One of the complicated tasks you may perform sometimes is “reinstall or repair Windows”. By using the following steps users can simply reinstall Windows 7 without any hassle. One can reinstall or repair Windows 7 either from a recovery image provided by your computer vendor, or from your genuine Windows 7 installation DVD or Windows 7 USB flash drive.

Why to reinstall Windows 7?
Users generally get confused between a repair installation and a clean installation. Repair installation is not same as clean installation. You should go for a repair option, if you want to preserve user accounts, data, programs and device drivers. One can also reinstall Windows 7 in order to replace corrupt system files but wants to keep all his personal data and programs intact.
Important: reinstall Windows 7 if and only if:
•A System Restore didn’t work for you
•There is no other method that can repair your Windows 7
•You don’t want to perform a clean installation
•You want to preserve your user accounts, data, programs, and system drivers

Follow the given steps to reinstall Windows 7:
STEP 1. Insert Windows 7 setup disk into DVD-ROM and reboot your system and boot it from the Windows 7 DVD.
STEP 2. Select the Language to install, Time and currency format, and Keyboard or input method that you’d prefer to use in Windows 7.
STEP 3. Click on the Repair your computer link on the bottom-left of the Install Windows box.
STEP 4. Windows will now search your hard disks for previously installed version of Windows 7.
STEP 5. Select the windows 7 installation that you’d like to perform the Startup Repair on. Click on Next button.
STEP 6. Click on the Startup Repair link from the list of recovery tools in System Recovery Options.
STEP 7. The Startup Repair utility will now look for problems with important Windows 7 system files. If Startup Repair detects an issue with a critical operating system file, the tool may offer a solution of some kind that you have to confirm or may solve the problem automatically.
STEP 8. Startup Repair will now attempt to repair whatever issues it found with Windows 7 files. No user intervention is required during this step.
STEP 9. Next enter your Windows 7 serial key.
STEP 10. Click on Finish button once you see the reboot your computer to complete the repairs pop message to restart your system and boot Windows 7 normally.

Limitation
You might lose your favorite applications after performing a successful reinstallation of Windows 7, so you should always prepare to reinstall your programs just in case the Repair Install damages any of installations.

Recommendation
Your system may boot several times while you Reinstall Windows 7. Do not boot from the Windows 7 DVD on any restart. If you do, you’ll have to restart immediately so the Startup Repair process can continue normally.