Slow Macbook Pro and Reinstall of OS X

Hello All,
I recently discovered that my macbook pro (mid 2012) was running extremely slow and occasionally when it went to sleep, after about half an hour I would find it extremely hot. Not knowing how to fix it, I took it into a Premium Service Provider (I am currently in a country in Europe which does not have an official Apple Store) and they said all that needed to be done was to reinstall the OS. So I made a bootable USB drive featuring the Mavericks install app and tried to perform a clean install (I thought it would be better to start from scratch as I had backed up all my important data before taking it in for service). At the end of the install, it said that 'An error occurred while preparing the installation. Try running this application again.' I saw in another thread that they recommended going into Disk Utility to verify and repair the disk, but when I got there the hard drive (Macintosh HD) wouldn't show up. Similarly, it doesn't show up as a potential startup disk, and when I went back to the Install OS X program, it wasn't listed as an option to install.
I guess my question is this, is there an easy fix or should I take it back into the shop on Monday? Fortunately, I'm still covered under AppleCare so a hard drive replacement wouldn't be backbreaking.
Thanks for all the help!

Since you're under Applecare, this isn't worth a great deal of troubleshooting time for you. A question though... when you tried the clean install, did you partition and format the HD? Does it still show up in Disk Utility? If so, partition and format then try the install.
The fact that it's running extremely hot could be an indication of a failing drive, but you can also try to reset the SMC just in case it's something else.
http://support.apple.com/kb/ht3964
Reset the SMC first. It won't hurt anything.

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Disclaimer: Apple does not necessarily endorse any suggestions, solutions, or third-party software products that may be mentioned in the topic below. Apple encourages you to first seek a solution at Apple Support. The following links are provided as is, with no guarantee of the effectiveness or reliability of the information. Apple does not guarantee that these links will be maintained or functional at any given time. Use the information below at your own discretion.
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14. Apple Airport and Time Capsule firmware updates can be found on:
http://www.apple.com/downloads/macosx/apple/firmware_hardware/
This is the 1st version of this tip. It was submitted on August 14, 2009 by a brody.
Do you want to provide feedback on this User Contributed Tip or contribute your own? If you have achieved Level 2 status, visit the User Tips Library Contributions forum for more information.

"this tip ready for consideration"
Please put in:
http://discussions.apple.com/category.jspa?categoryID=140
http://discussions.apple.com/forum.jspa?forumID=1222
http://discussions.apple.com/category.jspa?categoryID=218
http://discussions.apple.com/category.jspa?categoryID=190
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