Some applications free DLLs that are still in use. If this occurs, and the offending application attempts to make a call ...

Some applications free DLLs that are still in use. If this occurs, and the offending application attempts to make a call to an exported function, the call fails with an access violation. This compatibility fix ignores calls to the FreeLibrary API using a list of DLLs to ignore. For example: USER32.DLL;GDI32.DLL.