System Restore From Bootable Pendrive or CD/DVD

Windows System Restore is a useful feature to recover  with the problematic changes that happened with your computer/laptop. But what if the computer can't boot and you don't want to install a new copy of windows.
Problems like

• After installing antivirus or updating an antivirus the computer hangs on the login screen or hangs after the login screen
• Computer can't start in Safe Mode

Solution

1. Bootable OS for accessing File system :-

The easiest way to do this is to create bootable OS using CD/DVD or USB. This could be a Windows PE type disk such as bartpe, reatogo, or hiren. Or even a linux flavor such as knoppix.

If those aren't available, you can also slave the hard disk to a working system. The goal is simply to access the filesystem.

 How to Create Bootable USB Pendrive

     2.  Backup Current Config Files:- 

              Go to C:\windows\system32\config and create a folder called backup. Copy everything in            the config folder into the new backup folder just for safe keeping. If you don't want to copy            everything (such as event log files), then only backup the following files: system, software,            sam, security, and default.

           Note:- Enable viewing Hidden Files

     3.   Access "C:\System Volume Information " and Backup Files

             Change your "View" options to show details so you can sort the files/folders by date                     modified or created. Go to the most recent folder created BEFORE the issues had                     arisen. Inside that folder is another called "snapshot."  Open it and copy the following to a           temp directory:

           _registry_user_.default 

               _registry_machine_security 
               _registry_machine_software 
               _registry_machine_system 
               _registry_machine_sam

     4.  Rename Recovered System Files

           Now in the temp directory, rename them to:

           default
           security
           software
           system
           sam

    5. Copy To "C:\Windows\System32\config"

           Copy those 5 files to C:\windows\system32\config, replacing the existing files in that                    folder (permitting you backed them up in step 3).

     6.  Reboot

          Shutdown the OS you were using and/or reinstall the disk to it's original computer (if you             didn't use a bootable OS CD/DVD).

          Start the computer back up. It should now be booting with the system files you manually               recovered from the system restore files.

Now you have successfully Manually Restored your computer.