I have noticed that Nightly says that "is being managed by my company". I looked what was wrong, and I see that Avast installed a certificate with value "Install" called "wscert.der" at "C:\\ProgramData\\AVAST Software\\Avast\\wscert.der". I want to know what it is doing to my browser since I got absolutely no warning about it being installed. Also, I want to know how to remove it. Thanks for your help.