Error 0x80070020

[KenR21]

How to solve backup not complete problem - Error 0x80070020

[Victor143sierra]

Many programs can cause this issue to occur; the most common are antivirus programs and programs that perform real-time backups of system files.

 1. I suggest that you disable the Antivirus\Firewall temporarily and then check for the issue.

 Note: Please make sure that you enable the antivirus software after performing the test to keep your computer protected.

2. The error message you are getting also applies to Microsoft updates in Windows7. You may have some bad updates that need to be resolved in order to fix this issue.

Please go through the below article:

http://support.microsoft.com/kb/883825

3. I would also suggest you to refer the below link that talks about a similar kind of issue you are experiencing and follow the steps provided by wornout99 on Monday, January 18, 2010 between 12:04 AM:
http://social.answers.microsoft.com/Forums/en/w7performance/thread/a4abfd13-edcd-44e5-b658-2440672f1...

 Hope this helps.