M15x (i7 version) - touchpad lag / keyboard leaves out strokes (Win7)

Yesterday I got my brand new m15x with the new quad core. When I started the machine for the first time, I had the issue, that the mouse was lagging and not all entered keyboard strokes seem to be recorded. I did not care much, because I was going to install Windows 7 anyway
Today I installed Windows 7 and it all worked like a charm. Happily I went to the Device Manager and began installing:

1. Graphic driver (nvidia card) and reboot -> everything fine
2. IDT-driver (audio) and reboot -> everything fine
3. Intel Driver (chipset) and reboot -> everything fine
4. Ricoh Driver (R5C833) and reboot -> MOUSE LAG and Keyboard.

Now the whole system seemed to have slowed down somehow... And even worse sometimes buttons, for instance in the download dialog were blinking, like someone clicks on them like crazy.

5. I installed all the other drivers (hoping it would stop) and at a certain point, I plugged out the power supply to recharge my cell phone. I got like 1 question mark left in the device manager right now, but the mouse lag is not gone yet

6. I plugged in the power cord again -> Lag gone
I have the impression, that it is still not running smooth, but I can type without missing out keys.

7. I plugged out the power cable again -> MOUSE LAG and Keyboard problem.

8. - 12. in disbelieve repeating former to steps

13. Writing a post, that the awesome guys at notebookreview have the solution (as usual) and save my day!!!


Thank you very much!