how to repair windows can not booting

if you have problem with your windows can not booting, maybe cause is your registry in windows error.

The first note is read what the error message or warning when a computer problem. If necessary, write down what the last or the message that appears on the screen. Not all errors due to damage to the windows registry. Damaged Registry windows are usually marked by the emergence of a message like the following:

1. Stop: c0000218 {Registry File Failure} The registry cannot load the hive (file): \SystemRoot\System32\Config\SOFTWARE or its log or alternate
2. file is missing or corrupt: \WINDOWS\SYSTEM32\CONFIG\SYSTEM or \WINDOWS\SYSTEM32\CONFIG\SOFTWARE, or \WINDOWS\SYSTEM32\ 
3. System error: Lsass.exe

Besides the example error message above, may still be many similar messages that appear when the system / registry windows were damaged. If the computer when booting or restarting behenti only in error messages like the above, it can try the following easy steps:

1. restart your computer
2. after that you must push button F8
3. select last known good configuration (your most rencent settings that worked) or repair your computer for windows 7
4. After the above steps, there may be some program or software recently installed could not work properly. This is because it could be data backup windows registry has not saved the configuration software is installed, so the software needs to reinstall.

If the above steps do not work, then it might be done with manual steps. The point is to replace the windows registry files are corrupted. Windows registry files is at location c: \ windows \ system32 \ config, the file is:

•      system
•      software
•      sam
•      security
•      default

Registry backup files are usually in the folder C: \ WINDOWS \ repair. To replace the files over, can use a bootable CD / flash or manually using the windows repair, steps can be seen more at support.microsoft.com