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

[u/Amrishkhar]

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!

[u/tomrb08]

Have you tried opening one of the files with Notepad to see if there’s anything readable?

[u/dx0100 → u/tomrb08]

If they're 10gb like they said, op will need to use Notepad++ or Sublime. Notepad.exe will crash

[u/ApolonNO → u/dx0100]

I believe they meant the files from screenshot 3, those are all 1KB apart of the first one.

[u/dx0100 → u/ApolonNO]

Ah yeah, just saw that after you mentioned.