UAC Support for Registry Modifications
When performing registry modifications under the HKEY_CLASSES_ROOT hive in Windows versions beyond XP, such as Windows 7, Vista, and 2008, users may encounter the "Requested registry access is not allowed" error. This error stems from the introduction of User Account Control (UAC) in these operating systems, which enforces stricter security measures for system-level changes by requiring elevated privileges.
To ensure proper UAC support for registry modifications, it is necessary to add the following elements to your application manifest file (.manifest):
<?xml version="1.0" encoding="utf-8"?> <asmv1:assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1" xmlns:asmv1="urn:schemas-microsoft-com:asm.v1" xmlns:asmv2="urn:schemas-microsoft-com:asm.v2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <assemblyIdentity version="1.0.0.0" name="MyApplication.app" /> <trustInfo xmlns="urn:schemas-microsoft-com:asm.v2"> <security> <requestedPrivileges xmlns="urn:schemas-microsoft-com:asm.v3"> <requestedExecutionLevel level="requireAdministrator" uiAccess="false" /> </requestedPrivileges> </security> </trustInfo> </asmv1:assembly>
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By incorporating this manifest modification, your application will properly handle UAC elevation and allow you to make registry modifications under HKEY_CLASSES_ROOT in Windows versions with UAC enabled.
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