How To Open/Download .KEY File Extension

[Whitespirit66]

I'm trying to install new anti virus software.

The email from Avira has my registration in a .Key file extension attachment. My XP Home can't open the attachment.

Have already installed 2 useless programmes, which promised to be able to help me. In reality, all they wanted to do was sell me something.

How can I open this? What can I install that is reliable and will help me?

Many thanks

 

[Whitespirit66]

Cancel the above.

I didn't need to open it after all. Just had to open/attach it to the antiv set-up to validate the licence!

You learn something new every day!