Windows 8.1 64-bit: High memory usage

The high memory usage comes from a high Page table and Driver Locked usage.

To see which processes causes the page table usage, install the Windows Performance Toolkit, open a command prompt as admin and run this command:

xperf -on ReferenceSet -BufferSize 1024 -MaxFile 512 -FileMode Circular  && timeout 5 && xperf -d C:\HighMemoryUsage.etl

Open the HighMemoryUsage.etl with Windows Performance Analyzer (WPA.exe), drag and drop the graph "ResidentSet" from the left graph list to the analysis pane:

Now move the "Page Category" column to the left side and expand the "Page Table" entry:

Here you see the processes which have the high pagetable usage. On the right site (after the blue line), you see page table memory usage in MB for each process.

The Driver Locked usage can be caused by Virtual Machines like Hyper-V. If this is not the case, use the Windows Assessment Toolkit to see which driver is causing the Drivers Lock usage: