I would reinstall windows. It sounds like that file is corrupt or was one of the virus infected files. If there was a virus on your computer, those .exe files that you quarantined may be need for Windows or other programs to run. Reinstalling is the only good way to resolve your problem.
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Msgsrv32 (not responding)
This program is one of Windows' components that runs invisibly in the background. It performs several necessary functions, including the following (this information is taken from Microsoft's knowledge base):
• Mediates Plug-and-Play messages among various parts of the operating system.
• Coordinates automatic responses to setup programs. This includes checking whether a setup program has improperly overwritten Windows files, and optionally restoring the Windows versions of those files-see "Your Sysbckup folder" later in this chapter.
• Displays the initial logon dialog box if multiple users are configured, or in some circumstances, if networking is enabled.
• Plays the system startup and shutdown sounds.
• Loads installable Windows drivers at startup and unloads them at shutdown.
• Runs the shell program (usually Explorer.exe) and reruns the shell if it closes or fails to respond.
Because of the varied nature of this program, almost anything can cause it to crash. If it does, you can end its task. If this happens more than once, it's best to restart Windows immediately.