Cubase 5 Playback Skips and Glitches?

Hello,

I usually have a lot of tracks on my projects, and my interface and laptop have no problem playing them back.

But I recently took my laptop out of my house, and when I returned, my project was really laggy, and had a whole bunch of lags and skips on playback.

I tried reinstalling my interface drivers, but that’s not the case. I also tried the ASIO4ALL driver with my interface but it’s the same problem.

I don’t think that it’s the interface’s fault, because the each track glitches after I solo it, whether it’s with the focusrite or my computer’s audio card.

I use,
Cubase 5
Focusrite Scarlett 2i2

Any solutions?

Thankss
-Dennis