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[Answering] BAT files broken after recent Microsoft Update

Posted on: Jun 26 2014 Category :Windows > Windows Server General Views: 921 | Subscribe

Been beating my head against a wall. I updated several Windows Server 2003 R2 servers with critical and security updates. On two of them, I've encountered an issue where batch files will not execute if double clicked or called from a run prompt. When they are double clicked I get the error message:

"The filename, directory name, or volume label syntax is incorrect."

This is happening with batch files only, so I don't believe its an issue with a folder or drive. Even creating a brand new batch file doing a basic task fails. However, if I open a command prompt and execute it from there it runs fine so I don't think there is an issue with the underlying system, its just something with the Windows Explorer seems broken. I've tried deleting/recreating the file associations under HKEY_CLASSES_ROOT for both .BAT and batfile.

Really stumped here, hoping someone has seen this or has some idea of what I can do to fix it.

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