You can install pavers over existing slabs, and sometimes concrete. Here, might not be the best choice because it would raise the height. True interlocking pavers are 2 3/8" high, porcelain if good for your climate are thinner, but both need a bedding course. Concrete would be 4" minimum.

The existing slab already compromised something as you need at least 2" between hardscape and the wood of the house walls to prevent rot and pests (it's even code).