[Rwp] Odd behaviour when adding an effect

[onlineeagle]

Hi, I’ve just started using Reaper on Windows. I’m using windows 7 on a newly formatted laptop. The laptop isn’t particularly new, but I still don’t think I should be expereincing the issue I’m experiencing. As soon as I add an effect, like ReaVerb, the playback starts to become a bit glitchy. Then as soon as I move one of the sliders on the plugin, like the wet signle, playback stops. Any ideas why this might be happening? I might have to go down the route of installing windows on the mac, if the laptop isn’t up to the task, but I thought that I should be at least able to 
 

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