I keep getting an error after downloading the Mavericks upgrade

I have a 2011 mac mini running Lion 10.7.5  that I want to upgrade to mavericks. I have not had it very long so I hardly have anything on it. I have downloaded and installed all of the updates and verified that the hdd is ok and downloaded the free Mavericks upgrade then when it finishes the  5.30 gb file download I get an error and a cancel or retry option. Did this 3 times. I would appreciate any help or ideas that anyone can suggest. Thanks

HI, Thanks for asking but although i can use wifi, I made sure that I am using the wired ethernet for the upgrade. It will complete the download but just as soon as it completes the 5.30 gb file that is when I get the error. I think that I have everything covered on the check list as far as preparing it for Mavericks. I have no hardware hooked up to it only usb keyboard and bluetooth mouse. I even unhooked the super drive. After doing some checking I'm not so sure that the upgrade is worth it. I have a program I want to install that says requrements are Mac OSX 10.8 or higher that is why I wanted to do it but the majority or people seem to be having serious issues with Mavericks. I'm starting to think it may not be worth the trouble. Thanks for your reply

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