Support Need Help-Unable to Update Android!

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http://androidforums.com – I've had my phone for almost a year now and today my friend (who has the same phone) asked me if I've updated my phone yet. But when I connected my phone to my PC laptop, there were no new updates to be found. I also tried going to settings and about phone, also no new updates found. I'm not sure if there's something wrong with my phone because after I disconnected it to my PC laptop, the phone would freeze. The SD card also periodically doesn't read and I would have to restart my phone and pull out the card. Please help! model #: SK17a android version: 2.3.4 kernal version: (General)