@Cruis.In
Maybe I misread your last line so just let me make things clear. I do not have any performance issues once I disable all unnecessary services. The ocean under the moon moves smooth...

Shark7 is quite right if he says that you can badly mess up your OS by tinkering with the services. However, the Devs of Windows have thought of this possibility and supported us with a safety switch, in case we are in the mood of tinkering.
1. Open the run box. Either by clicking on the "start button" and "run" or by pressing the "windows button" on your keyboard while simultaneously pressing "r"
2. Type the command "MSCONFIG" into the run box and press Enter
3. Click on "Services"
4. Make sure the box "hide all microsoft services" is ticked. Now you only see services non vital for Windows
5. Click on "disable all"
6. Click on "Accept changes"
7. Restart your computer and test the performance in DW
8. Give us some feedback
Be aware however, that if you keep these settings you need to start every service manually if you need them. The service starts automatically if you try to run the program which is in need of the service. But if you have any programmes who runs themselves during the system start (like anti-virus or firewall) you have to activate them manually. Of course you can also activate the corresponding services via the MSCONFIG command to keep them running. Or, if this solution works, you can only disable the services while you are playing DW.