Event 1041 - UIPI Extension Blocked
Applies To: Windows 7, Windows Vista
User Interface Privilege Isolation (UIPI) blocks lower-integrity processes from accessing higher-integrity processes. For example, a lower-integrity process cannot send Windows® messages, or hook or attach to higher priority processes.
UIPI Extension blocking prevents the loading of some Internet Explorer® extensions that are known to be incompatible with Windows Vista® and Windows® 7, or have potential security issues. Typical extensions that could be blocked are:
ActiveX® Control
Toolbar
Browser Helper Object (BHO)
Browser Extension
MIME Handler
Pluggable Protocol
A list of known extensions are listed in the registry at HKEY_LOCAL_MACHINE (or HKEY_CURRENT_USER)\SOFTWARE\Microsoft\Internet Explorer\Extension Compatibility
When Is This Event Logged?
This event is logged when an incompatible or potentially dangerous Internet Explorer extension is encountered.
Note
For more information and examples, see the Event 1041-UIPI Extension Blocked topic from Internet Explorer Application Compatibility.
Remediation
There is no fix for this compatibility issue. You must be aware of this issue and design your Web site accordingly.