Upcoming Windows 7 is being said to be the most secure and reliable as compared with other versions of Windows, but you can still run into problem, the worst case being when your Windows stops booting. Windows 7 has a solution to this problem, create System Repair Disc. Once you run into this problem, you can boot your system with it and it will give you access to System Recovery tools which will let you diagnose and correct errors within Windows 7. It is very easy to create a System Repair disk since no special disk burning software is required.
Note: If you haven’t created the System Repair Disk and your Windows 7 fails to boot, you can borrow it from your friend or co-worker. The system repair disk should work on all computers that are running Windows 7.
First, navigate all the way to Start > All Programs > Maintenance > Create a System Repair Disc.
Now, insert a blank CD/DVD into you CD/DVD ROM and click Create disc. An empty CD should be large enough for a System Repair Disc because it does not consume much space. It will take some time to create the repair disk, you will be able to monitor the process with the help of progress bar.
Once the process is complete, click OK and eject disk from drive.
Thats all, now keep the System Repair Disc safe since it will be needed when Windows 7 fails to boot. Enjoy!