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Perhaps this will be helpful to other owners of Acer laptops with builtin SmartCard reader.

I recently decided to look at my Event Log in Windows XP and noticed that System log contains several error messages like this:

The description for Event ID ( 0 ) in Source ( O2SCBUS ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: , IOCTL POWER failed with status 0xc0000014.

As you can see it fails to respond to power control commands. This might be the cause of other problems you might have: failure to go into standby mode, slower startup/shutdown, etc.

I almost thought that it could be hardware failure.

Then I decided to plug in SmartCard. It went all the through without any resistance or click as it should be when it settles in. I pushed further and released it. It popped out. Subsequently, it started operating as it should. And error messages never appeared again in the log.

Since this is the first time I plugged the card in this laptop, that is how it came from the factory. Someone there plugged card and then pulled it out improperly (To properly get it out, you have to push it until it clicks, unlocks, and then automatically pops out), so the adapter thought that the card is still in while the slot was actually empty.

Hope that is helpful to other TravelMate owners.