Disk cache overload on small projects.

Hey.

Everything was ok with my PC in the studio. it is an old machine but can handle my projects.
I the last month I have Disk overload all the time, on small projects even.
and i will say just to make it clear, few months ago I ran BIG projects on the same computer with no problem.

Im on PC, with Nuendo 8.3, Aurora 8, big buffer. Can anyone help with this please?

Have you run a RAM test?