I am trying to do a clean install MacBook Pro

I am trying to do a clean install on my Dad's older MackBook Pro. He downloads things he shouldn't and after frustrations trying to wipe ou trojans and bad files I just decided that the only way to make this thing work again is to clean install it. It was already running yosemite when I started.

I followed the directions at

www.osxdaily.com/2014/10/18/clean-install-os-x-yosemite/

I used a flash drive to install os x yosemite installer and made it bootable per the instructions on the site.

Everything seemed to work fine, I loaded the drive as the statup disk, I erased the partitions and the hard drive with disk utitilies using the installer flash drive.

However when I try to start to Install Os X it runs for about 10 minutes and then gets stuck at "one second left" I accessed the log errors and got this

Apr 19 21:01:40 MacBook-Pro.local InstallAssistant[415]: Can not connect to /var/run/systemkeychaincheck.socket: No such file or directory

Apr 19 21:01:41 MacBook-Pro.local Unknown[397]: 2015-04-19 21:01:41.054 InstallAssistant[415:17320] Failed to connect (keyReceivingView) outlet from (IASetupWindowController) to (PUKDiskPickerHorizontalView): missing setter or instance variable

Apr 19 21:01:41 MacBook-Pro.local Unknown[397]: 2015-04-19 21:01:41.054 InstallAssistant[415:17320] Failed to connect (loadingDistProgress) outlet from (IASetupWindowController) to (NSProgressIndicator): missing setter or instance variable

Apr 19 21:01:41 MacBook-Pro.local Unknown[397]: 2015-04-19 21:01:41.054 InstallAssistant[415:17320] Failed to connect (loadingDistView) outlet from (IASetupWindowController) to (NSView): missing setter or instance variable

Apr 19 21:01:41 MacBook-Pro.local Unknown[397]: 2015-04-19 21:01:41.055 InstallAssistant[415:17320] Failed to connect (subtitle) outlet from (IASetupWindowController) to (NSTextField): missing setter or instance variable

Apr 19 21:01:41 MacBook-Pro.local Unknown[397]: 2015-04-19 21:01:41.055 InstallAssistant[415:17320] Failed to connect (keyReceivingView) outlet from (IAContentView) to (PUKDiskPickerHorizontalView): missing setter or instance variable

Apr 19 21:01:49 MacBook-Pro.local Unknown[397]: 2015-04-19 21:01:49.708 InstallAssistant[415:17328] ***storageTaskManagerExistsWithIdentifier:withIdentifier failed: Error Domain=NSCocoaErrorDomain Code=4099 "Couldn’t communicate with a helper application." (The connection to service named com.apple.nsurlstorage-cache was invalidated.) UserInfo=0x7f981cbde640 {NSDebugDescription=The connection to service named com.apple.nsurlstorage-cache was invalidated.}; {

Apr 19 21:01:49 MacBook-Pro.local Unknown[397]: NSDebugDescription = "The connection to service named com.apple.nsurlstorage-cache was invalidated.";

Apr 19 21:01:49 MacBook-Pro.local Unknown[397]: }

Apr 19 21:01:49 MacBook-Pro.local Unknown[397]: 2015-04-19 21:01:49.712 InstallAssistant[415:17328] ***cachedResponseForRequest:key:handler failed: Error Domain=NSCocoaErrorDomain Code=4099 "Couldn’t communicate with a helper application." (The connection to service named com.apple.nsurlstorage-cache was invalidated.) UserInfo=0x7f981ce92fe0 {NSDebugDescription=The connection to service named com.apple.nsurlstorage-cache was invalidated.}; {

Apr 19 21:01:49 MacBook-Pro.local Unknown[397]: NSDebugDescription = "The connection to service named com.apple.nsurlstorage-cache was invalidated.";

Apr 19 21:01:49 MacBook-Pro.local Unknown[397]: }

Apr 19 21:01:50 MacBook-Pro.local InstallAssistant[415]: GetDYLDEntryPointWithImage(/System/Library/PrivateFrameworks/CacheDelete.framew ork/CacheDelete,CacheDeleteCopyPurgeableSpaceWithInfo) failed.

Apr 19 21:01:50 MacBook-Pro.local Unknown[397]: Keyboard Layouts: duplicate keyboard layout identifier -16899.

Apr 19 21:01:50 MacBook-Pro.local Unknown[397]: Keyboard Layouts: keyboard layout identifier -16899 has been replaced with -28673.

Apr 19 21:01:50 MacBook-Pro.local Unknown[397]: Keyboard Layouts: duplicate keyboard layout identifier -16900.

Apr 19 21:01:50 MacBook-Pro.local Unknown[397]: Keyboard Layouts: keyboard layout identifier -16900 has been replaced with -28674.

Apr 19 21:03:44 MacBook-Pro.local Unknown[397]: 2015-04-19 21:03:44.052 InstallAssistant[415:17320] Layout still needs update after calling -[NSScrollView layout]. NSScrollView or one of its superclasses may have overridden -layout without calling super. Or, something may have dirtied layout in the middle of updating it. Both are programming errors in Cocoa Autolayout. The former is pretty likely to arise if some pre-Cocoa Autolayout class had a method called layout, but it should be fixed.

I already have his pertinant files back up. I just need to install a new system on this empty hard drive. What did I do wrong?

Matt