Windows update error 0x800705AA is a very critical error issue that comes to you due to incorrect registry entries or due to missing DLLs. When you try to install the updates in your Windows, you will get this error. After the occurring of the update error 0x800705AA in Windows, you cannot be able to update the Windows. Even the accessing of Windows components will also get problems. Therefore, it is very important to fix Windows error code 0x800705AA with the help of some manual or automatic error fixing procedures. You can use Advanced System Repair tool in the computer.