Changes to what and improvements to what?

If you mean Panda - it is cloud-based, so it runs off web-servers and doesn’t need to have the definition files on the installed PC.

I’m not sure I like the concept, but I haven’t tried it or heard of any real issues with it.

(It’s a bad solution if the PC were offline and you were installing software from a CD or USB key, but most users rarely do that anymore …)