Hi all and thank you for your valued support.
I have Logos 4 running beautifully on my PC and decided to install also on my Laptop, which has the following configuration: (I am sure it meets the minimum required specs.)
XP Prof SP3
Intel Pentium with 1.6GHz (I cannot see what Pentium Version it is)
1.25GB RAM
Upon launching Logos 4, the screen gets stuck on the Login screen. Few minutes later ... It now presents me with a black blank screen. Does this mean my Laptop does not really meet the minimum requirements?
Thank you so long. I hope you have good news. 
Regards,
Deon