I'll go through my general setup so you know the situation, I record three guitars with Guitar Rig 4, a bass, Addictive Drummer and sometimes another guitar or a vocal track. So only 4-6 tracks, at the most 8, and when recording I have open the CPU usage monitor. While recording and jamming, the CPU usage usually sits around 60-70% which is fine, is about 10-15 on each track. Active recording tracks sometimes climb to near 20% but this is still okay since its only one active track. Recently (like the last two months), every five minutes or so the CPU vst usage has been jumping really high, regardless of active tracks, often to about 140 or 150% and it makes my computer lag, and the recording I was doing is often completely wasted. The jump lasts for about 10 seconds and then returns as normal, then repeats every five minutes or so. Needless to say, it makes tracking a really difficult and annoying process, and it has only recently started happening. This does not happen in programs like FL Studio, and I often run antivirus scans and memory cleaners. I would just like to know if there is something I can do. My computer is Windows 7, it is a few years old though.