Weird error on Windows 7

Hello,
I have encountered an unfamiliar error on my Windows 7 that I can’t explain why it happens. There is a random error that keeps on popping up either when I start my PC or after my antivirus has started. I am using AVG and I do not know if it is causing this problem. I just thought of asking the experts here so that I can get all possible causes of this error shown below.

Error Error
An error occurred while displaying previous error
