Microsoft Support would later tell us the problem had something to with a design change to Remote Registry and how it deals with going idle, and another design change in Windows Server 2012 R2 about how it choose which services to make idle. We had no idea what it was and went down some rabbit holes before finding this forum post. To do this, open cmd prompt and type cd C:\Windows\System32\drivers. Now see which pooltag uses most memory as shown here: Now open a cmd prompt and run the findstr command. Using some forums posts, SysInternals, and I think a Scott Hanselman blog entry we were able to use PoolMon.exe to see that the system using all the Kernel Memory was Wnf. of 2 - Setup.exe not working - posted in Windows 10 Support: Using Win10 Pro, Trying to install a legacy game, but when I try to use the setup file, the mouse spins briefly and nothing happens. Run poolmon by going to the folder where WDK is installed, go to Tools (or C:\Program Files (x86)\Windows Kits\10\Tools\圆4) and click poolmon.exe. PoolMon (poolmon.exe), the Memory Pool Monitor, displays data that the operating system collects about memory allocations from the system paged and nonpaged kernel pools, and the memory pools used for Terminal Services sessions. Looking at the Task Manager, we could easily see that a massive amount of Kernel Memory was being used. Back in 2015, we started using Win2012 R2 servers and within a day of Production usage we started seeing Out of Memory errors on the servers.
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