SLOW SAmsunG Laptop!

Hi My son's SAMSUNG laptop 305E5A-S01CA http://downloadcenter.samsung.com/co...Manual_eng.pdf is running Win 7 32 bit.

After he logs on to the laptop just recently the Win 7 Welcome screen stays there about a minute or two.
This since he selected 'Optimize' through AMD Gaming Evolved. His Laptop seemed to run okay prior to this.

Any ideas why this could be?

ALSO:

Would the overall performance be better if the notebook was running the OS with 64bit? He plays games such as:

Counter Strike Global offensive
Star Wars The old republic
League of Legends etc.

Thanks