Error 126 is caused when Windows cannot find / read a particular DLL file that it requires on your system. This error will randomly show whenever you use your computer, as Windows requires the use of DLL files continuously when it's running. In order to fix this problem, you need to be sure that you have all the necessary components which Windows requires to run.
This error will typically show in this format on your system:
Could not start %ServiceName% service on local computer Error 126: The specified module could not be found
The way to fix the Windows error 126 requires you to make sure that the Microsoft Data Access Components installed on your computer is updated to the latest version out and by extracting the Srvsvc.dll file from your Windows XP installation CD onto your hard drive. The problem can commonly be associated with Windows Installer packages because outdated files produce conflicts with recent files primarily because their file size differs and you need to download the latest Microsoft Data Access Components from the Microsoft website to obtain the necessary components.
The second step to fixing error 126 is to use a registry cleaner program to fix any of the errors that your computer may have inside its registry database. The registry is a central storage facility which has been used since Windows '98 to help control the various settings on your system. It's often the case that the registry will continually become damaged & corrupted, leading to a lot of different errors being shown. To ensure this problem does not affect your PC, it's recommended that you use a registry cleaner program to fix the various errors your computer has inside.