How To Fix Windows 8 MBR (Master Boot Record)

Step 1: Insert the Windows 8 Installation Disc in your system’s optical drive, or use a bootable USB for that matter, and make sure you boot your PC using this removable media.

Step 2: On the Install now screen, select Repair your computer.


Step 3: On the next screen, choose Troubleshoot, followed by Advanced options.


Step 4: From Advanced options, launch a command prompt windows, and enter the following command:

                             bootrec.exe /fixmbr

Step 5: Once the command is finished, reboot your computer the normal way, and Windows 8 should load just fine now.

ERROR: ORA- 12638 Credential retrieval failed... ( Oracle Error)

Pls check the file, D:\Oracle\product\10.1.0\Client_1\network\ADMIN\sqlnet.ora and edit the following..

Original Entry - SQLNET.AUTHENTICATION_SERVICES= (NTS)

Modified Entry - SQLNET.AUTHENTICATION_SERVICES= (NONE)

Save the file and enjoy....

To disable Just-In-Time debugging by editing the registry

1. On the Start menu, search for and run regedit.exe
2. In the Registry Editor window, locate and delete the follow registry keys:
   
   • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AeDebug\Debugger
     
   • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\DbgManagedDebugger
     
3. If your computer is running a 64-bit operating system, delete the following registry keys also:
   
   • HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\AeDebug\Debugger
     
   • HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\DbgManagedDebugger
     
4. Take care not to accidentally delete or change any other registry keys.
   
5. Close the Registy Editor window.