There are so many applications or programs you access on your Windows computer. The Windows operating system gives you many services also. However, while you try to use some of the services, you may get some error issues on the computer screen that will make you annoyed if the issue is not fixed soon. Windows update error 0x80070020 is also one of those errors. You get this issue usually due to wrong registry entries or corruption in the system files. You should fix Windows error code 0x80070020 either with manual or with automatic error fixing. You can download and install Advanced System Repair tool in the computer to fix the problem automatically.