W520 "random" CPU slowdown to 0,8 ghz on AC mode

I'm working with a w520 (i7 2760QM, 16GB Ram, Samsung SSD 830, Win7 64 bit, bios 1.42). 
Producing music, I am working a lot with ableton live (live 9, 64bit), I'm in need of quite a lot of cpu.
So, I have two problems with my w520. 
1. On battery it slows down to 0,8 ghz (which seems to be a known problem, but I can not figure out how to resolve this isse)
2. Lately, even on AC mode, it somehow randomly slows down from a max of 3,1 ghz to 0,8 ghz as well. I cannot work anymore when this happens, everything is way too slow. It happens every 4-5 minutes, when I'm using ableton live 9. I already checked, it doesnt slow down, when the cpu gets hot, it also slows down with lower cpu temperature.
this is absolutely not working for me. I'd need a tool where you could tell the cpu at certain times, to stick with the maximum performance all the time. I'd also like to increase the speed when on battery. I noticed, there are some threads discussing this issue, but there seems to be a different solution for a lot of people.
w520, i7 2760QM, 16GB Ram, Samsung SSD 830, Win7 64 bit, bios 1.42

Your screen shot shows that ThrottleStop is in Monitoring Mode only so it is not trying to do anything to help with your throttling problem.
To use ThrottleStop, adjust the Set Multiplier value to 35T for your CPU, put a check mark in the Set Multiplier box and then click on the Turn On button at the lower right.  See if this makes any difference.
To post just an image of ThrottleStop, highlight ThrottleStop, hold down the ALT key on your keyboard and then while ALT is down, push the Print Screen button usually at the top right area of your keyboard.  This puts an image of just the program that is highlighted into your clipboard so you can open up Paint, etc. and Paste that image and then save it.  
Posting small images or links to images keeps the mods happy.  

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