Windows 11 Core Isolation not working, states tib.sys is incompatible driver
Windows 11 core isolation turns itself off because tib.sys is classified by this Windows security feature as an incompatible driver with this protection. I cannot find this file in File Explorer, and I do not know what I can do if I find it.

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Do you Explorer setting include show hidden and system files?
Ian
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This is a known issue and only resolved by Acronis in the latest build 40107 version of Acronis Cyber Protect Home Office which now offers a Custom Install option where users can now elect not to install the 'Try&Decide tool' feature (which brings the tib.sys driver to Windows).
For users of older versions of Acronis, see forum topic: Incompatible Driver(s): tib.sys? | Acronis Forum for information on how to circumvent the issue by renaming tib.sys to such as tib.~sys or by removing the associated registry entry at HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\tib
Note: you may need to do a Safe mode start of Windows to action the above options.
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Hi,
I have version build 40107 and still experiencing this issue. Please advise?
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Justin ryan wrote:Hi,
I have version build 40107 and still experiencing this issue. Please advise?
Use the Custom Install option and elect not to install the 'Try&Decide tool' feature (which brings the tib.sys driver to Windows).
Open the Control Panel > Programs & Features then select ACPHO and click on 'Change' to see the Custom Install option if already installed.
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