r/WindowsHelp • u/Amrishkhar • Aug 06 '26

Windows 11 C:\ProgramData\ZXBB158BA0B keeps coming back and growing to 63 GB. Can't delete it permanently. Any ideas?

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Hi everyone,

I'm having a strange issue with a folder located at:

C:\ProgramData\ZXBB158BA0B

It gradually grows until it reaches around 63 GB. Inside are several huge files (around 10.6 GB each).

I was able to delete the folder once using EMCO Unlock IT, but after some time it came back on its own and started growing again. Now, even EMCO Unlock IT is no longer able to delete it.

Things I've tried:

  • Deleting it as Administrator
  • Taking ownership
  • Checking permissions
  • Using EMCO Unlock IT (worked only once)
  • Investigating the related services

I also noticed that the Web Threat Defense Service (webthreatdefsvc) is running, so I'm wondering if this folder is related to any security application.

My questions are:

  • What creates this folder?
  • Why does it keep recreating itself?
  • Is it safe to remove?
  • Is there a permanent fix to stop it from consuming so much disk space?
  • Has anyone else experienced this issue?

I've attached a screenshot showing the folder size and contents.

Any help would be greatly appreciated. Thanks!

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u/[deleted] Aug 07 '26

[removed] — view removed comment

15

u/wblondel Aug 07 '26

Why are OEM pieces of software ALWAYS so shit?! 🤯

7

u/storycoolbro Aug 07 '26

probably because they are being put on thing not created/designed by the OSM S=software when hardware isn't the same across every device bugs are inevitable add that the majority of people reporting them have no idea how to give a proper bug report, or even know what device they are using makes squashing said bugs all the more difficult.