The procedure entry point IsThreadDesktopComposited could not be located in the dynamic link library USER32.dll

Dependency Walker is a free utility that scans any 32-bit or 64-bit Windows module (exe, dll, ocx, sys, etc.) and builds a hierarchical tree diagram of all dependent modules. For each module found, it lists all the functions that are exported by that module, and which of those functions are actually being called by other modules. Another view displays the minimum set of required files, along with detailed information about each file including a full path to the file, base address, version numbers, machine type, debug information, and more.

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Experience shows that it is often Microsoft dwmapi.dll from Vista

that triggers the problem. If so, it should be renamed to

dwmapi.dll.bak and the system should be restarted after which

the file can be deleted to solve the problem.

for what it's worth, I installed a program called "free video dub" and by coincidence? the problem
occured POST that installation. ?

how is this error fixed?