Help with Reg files

I try to double click on the Kaspersky keys to get it working but instead I get this message

Anyone know how to fix this, Thanks in advance
Answer #1
Maybe you should update trough Kaspersky..In the start menu…Under Kaspersky…there is an option that let you update a new key…
Answer #2
Sorry, I should have been more specific but it does this with all the reg files I tried a few others and it gave me the same error message
Answer #3
What’s the extension of the registry files?
Answer #4
It shows the extentions as .key
Answer #5
Nope those are used by software…You can only import registry files that have .reg extension…