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Why does my computer go nuts sometimes?

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Summary: If you have speech recognition always enabled it can cause your computer to "go nuts" because of the different sounds it interprets as actual words.

My computer behaves erroneously frequently. It suddenly closes all IE browser windows, opens start menu and repeats this process. OS: Windows XP. In the task manager I saw "sapisvr.exe" during this process sometimes, not all the time.

It's a really weird thing to watch - it's almost like your computer has suddenly become possessed. But the question holds a clue: sapisvr.exe.

Chances are, though, the computer is really only doing what you're telling it.

Literally.

Sapisvr.exe is Microsoft's Speech Recognition engine. When enabled, it listens to what's coming in on the microphone and attempts to interpret what it hears as words, then enters keystrokes to "type in" those words it heard.

That's nice, in principle, but if it's always enabled it can cause exactly the odd behavior you describe. You make a noise (just about any noise can cause it to think it's heard a word), and keystrokes get entered. Or ambient noise is enough to cause it to try to recognize speech.

Normally this feature should be disabled, but apparently some PC manufacturers or others enable it by default.

"... it listens to what's coming in on the microphone, and attempts to interpret what it hears as words, and then enters keystrokes to 'type in' those words ..."

To disable:

  • Go to Control Panel

  • Click on Regional and Language Options

  • Click on the Languages tab

  • Click on the Details button

  • Click on Speech Recognition

  • Click the Remove button

And if you're wondering why this could be happening if you don't have a microphone, look again. Many laptops in particular have built-in microphones, and I'm lead to believe that some other computers may as well.

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Article C2153 - August 11, 2004

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Recent Comments
36 Comments

why does my computer mouse stop working, red light goes out, when I unplug it and plug it back in it works again.

Posted by: shannon at October 20, 2008 3:18 AM

every time i connect to the internet and it shuts down after a warning of a generic host process win32 service appears and when service pack 2 is installed my computer won start up at all

Posted by: nelly at November 23, 2008 7:32 AM

Same problem with mouse; mine is "stalling". I have a new CORDED mouse, and a large foam rubber pad that I use as a mouse pad... never had problems until I installed Adobe Flash 10... This is the buggiest program out there. I think that might be causing the problem. Checked for viruses and spyware; don't have any of that either. Suggestions please?
Thanks :)

Posted by: none at February 19, 2009 10:19 AM

When i click in on a page for info, this page will automatically go off, and i have to start from the beginning to get that page again. Then it will go off again in a matter of a few minutes. What is the problem??

Posted by: Don C. Schwartz at May 13, 2009 4:16 AM

There is NO "Speech Recognition" tab or button after Deatila in Windows XP!!!! Useless info!

Posted by: dana at May 17, 2009 4:52 PM

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