Question about Microsoft Windows XP Home Edition
If it is system error code.
System error code 400 means "The thread is already in background processing mode." This error code may also display as "ERROR_THREAD_MODE_ALREADY_BACKGROUND" or as the value 0x190.
Clean your system using any commercial or free system utilities like CCleaner(free), and cleanup the system registry too.
Posted on Jul 10, 2010
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Posted on Jan 02, 2017
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