Do you have enough HDD Space?
But, I would say, you may have to redownload the installer...
Since installer is large, there is a change that it may get corrupted. It is best to download with wired connection instead of wireless one.
Sincerely, Pan2011 ~ Pan2013 (March 27th, 2013)
Anywhere at anytime... So... Technically...
(courtesy of ivanKaliayev)