Working on the Windows computer gives you amazing experience. You can install and access many applications in Windows computer. But sometimes when you try to start a program or when you try to open any applications in the Windows, you will get Windows registry error 0x51. Mainly the error comes to you due to the incorrect registry entries. You may also get this error issue sometimes when you try to logon to the computer. Error code 0x51 in Windows is a very critical error issue and you must stop or fix it as soon as possible. You can go with some manual or automatic error fixing method to get rid of this issue. If you have not deep technical knowledge, you can also download and install Advanced System Repair tool in the computer.