CBSpersist log automatically created and filling up drive. How do I stop sfc.exe from autorunning

I am working on a machine where the client complained that the drive kept filling up. Upon checking I realised that over 750GB was occupied with CBS logs. These logs are usually generated when SFC.exe (System File Checker) executes. However, they are being
created an average of 3 times a week and no one onsite is running SFC. The logs go back to 2012 so it appears that somehow SFC is autorunning..
I could not locate a scheduled task for it in Task Scheduler. 
Is there a wasy to confirm that there is no schedule task other than again going through every single element. 
Any ideas as to why it is happening and how to stop it will be greatly appreciated.
The machine is running Windows 7 Home Premium.

Hi,
Are we in a domain environment?
Did this issue occur on a special machine or with all the clients in the domain?
CBS is Component-Based Servicing, and CBS.log logged the information for CBS events. More information regarding CBS, please take a look at:
Understanding Component Based Servicing.
Could you please have a share with the recent log file before going further? There might be some issue keep logging in the log file. Upload it to skydrive if possible and post us the link here.
Best regards
Michael Shao
TechNet Community Support

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