The C: drive on my Windows 8 machine is clicking away at 1 second intervals, writing to
wfpdiag.etl. I'd like to find out why.
Looking at the Resource Monitor and the Sysinternals Process Explorer, I see that it's PID 4, "System" that is doing the disk access. It's writing about 32K (1 write) every second.
Here is the constant disk access:
And here is the periodic writing.
The "Writes" number increments once a second. Performance Monitor tells me it's writing to a file called wpdiag.etl, which I understand to be related to the Windows Firewall. Is there any way I can disable the writing to this file?