New
#11
The boot log you provided doesn't help as it has no time stamps so there is no way to tell where the time is being spent.
You did the memory test and the hard drive test and all is well?
I notice you have an odd amount of ram. How is it installed? By that I mean how many ram modules and what are their sizes.
As cyclic mentioned, this could be a graphics card/chip problem. DO you have the latest drivers installed?
What is the make and model number of your computer?