[Aiken]

Did you set up Litestep to be a primary shell? Because it can run together with explorer, but in this case you'll have very slow system.
Grab some lightweight theme, default Austerity theme consumes quite a lot of resources.

Personal opinion: I stopped using LS 2 years ago, because I had not time to tweak it and swithched to geoshell, and then to bb4win (bbLean)