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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:
Image

And here is the periodic writing.
Image

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?

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The fact that System is doing what you say, is pretty normal. The fact that your drive is audibly clicking is not (presuming it's actually a louder than normal clicking. :) ). Have you checked the disk for defects using the manufacturer's utilities yet? –  techie007 Jan 20 '13 at 18:19
    
possible duplicate of Hard drive clicking, but no errors also see Faulty hard-drive? and New Laptop hard drive is clicking –  techie007 Jan 20 '13 at 18:21
    
It is not a faulty hard drive. It is a file being written to. I'd like to get rid of the writing to the file. –  pom Jan 20 '13 at 18:34
    
same problem, it's very annoying. btw how did you know exact file name? (wfpdiag.etl) I couldn't find where to look at... –  Sarge Borsch Apr 15 at 16:13
    
i have no such file, but my System process is constantly writing something –  Sarge Borsch Apr 15 at 16:29
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1 Answer

Do you have software called Windows7FirewallControl from Sphinx? Software site: http://www.sphinx-soft.com/Vista/index.html

Some have reported that it was responsible for this write pattern: http://www.vistax64.com/vista-security/68952-wfpdiag-etl-what.html Uninstalling or disabling it stopped the constant write activity to that file.

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No, I haven't installed any firewall or other network analysis or antivirus programs. This is basically a new Windows 8 install. –  pom Jan 20 '13 at 19:26
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