Dell Precision M4800 :: Fan Noise Without Substantial Load

I'm a proud user of an M4800, but the constant fan noise bothers me a lot. I ordered it wit win7 but almost directly switched to win 8.1.

What I already discovered:  In the event viewer I experienced a lot of MSI error events (every 11 seconds) .

 Event filter with query "SELECT * FROM __InstanceOperationEvent WITHIN 10 WHERE (TargetInstance ISA 'Msvm_ExternalEthernetPort') OR (TargetInstance ISA 'Msvm_VmLANEndpoint') OR (TargetInstance ISA 'Msvm_SyntheticEthernetPort') OR (TargetInstance ISA 'Msvm_ComputerSystem') OR (TargetInstance ISA 'Msvm_VLANEndpointSettingData')" could not be reactivated in namespace "//./root/virtualization" because of error 0x80041010.

Events cannot be delivered through this filter until the problem is corrected. If I stop the Intel(R) PROSet Monitoring Service these events stop, but I wonder if the performance of network devices is not affected negatively:

The Intel(R) PROSet Monitoring Service actively monitors changes to the system and updates affected network devices to keep them running in optimal condition.  Stopping this service may negatively affect the performance of the network devices on the system.

Nevertheless after this action CPU usage has dropped, but still too much fan noise while the system does nothing ;o(

I contacted support and they adviced me to reinstall with win7, but that is no option for me for the moment.

My power options are set to 'Quiet (Reduced Fan Levels)'

In the BIOS vA03 I could not find an option to  lower settings there. and all latest drivers are downloaded and installed.