Avira installation of the LSP failed

Hello,
I am having problems installing Avira Free Antivirus downloaded from the internet. The error is as shown in the image below.
How do I fix this?

The installation of the LSP failed. AntiVir MailGuard and Antivir WebGuard therefore cannot be installed. We recommend that you repair the LSP stack and the reinstall AntiVir MailGuard and AntiVir WebGuard via the user-defined installation.
