Boot Time Protection slow (Normal)

My dads new laptop had McAfee installed - i uninstalled it immediatley after turning on laptop for first time and installed Norton IS 2011 - all is well except when get to logon screen it takes exactly 20 seconds to logon - when turn off BTP its instant?

yet on my slower Acer laptop it only takes 5-6 seconds on normal?

 

thing is his windows 7 is 64-bit but mine is 32-bit and i wondered if that had a part to play?

 

i dont think its anything to do with previous McAfee but im running Removal Tools for both

 

anyone help?

 

thanks