It would help to know what your CPU, Ram and GFX card are now to kind of get an idea what it could be.
Taking a couple seconds to respond to a button press is not normal, even on most of the slower machines. You could possibly have a flash version issue, but its hard to tell with the info you have given so far. Open the task manager, and see what your CPU is doing when RR is running. If it's maxed at 100% then there is something not right somewhere.