MBPr taking too long to boot after 10.8.4

Hello all

I updated to 10.8.4 through the App Store yesterday and realized my mistake right after the first restart. First the spinning thing would keep spinning for like forever and then when it's finally done the screen flickers to another white screen with the apple logo but this time with a stuck cursor on the top left. The only way to get out of this is to let the MacBook go to sleep after which it comes back to the login screen. Now I have already tried booting into 10.8.4 recovery and doing a reinstall with no effect at all. I have also tried doing a clean install using a 10.8 USB and then using the combo installer to bring it to 10.8.4. It's quite surprising that none of the options worked. There's no one talking about this as well which gives me hope (perhaps a fools hope) that perhaps there's a quick fix to it.

Only option that remains is to download OS X 10.8.4 from App Store and then try doing another install. I am however not sure if that would work as well.

Please help!

Thanks

Sajat Jain