Steam is resetting everytime I turn on/off my PC

Ever since I installed AVG, Steam has been giving me errors every time I boot up, and then forgetting passwords and preferences. This has only started since installing AVG, so I know that that is the issue. I've tried making Steam and exception to it but that hasn't worked.

Hello Padraig,
Thank you contacting AVG Community support.
We understand that you are getting errors from steam on booting up the computer. To check further with the issue, please provide us the screenshot of the error you are getting. 

Please make use of the article to know the steps to take a screehot: Steps to create screenshot (https://support.avg.com/SupportArticleView?&supportType=home&urlName=AVG-Create-screenshot)
Please let us know the AVG programs installed in your computer.
Thank you.