Do you by any chance know which Core i5 version is in that laptop (and how much RAM you have)?
I have a pretty low-end version in mine, and it runs BSim fluently.
A laptop is not the best thing for graphics, a desktop is better, especially with a proper graphics card rather than graphics integrated into the CPU, as laptop components have power, size and heat restrictions that don't apply to desktops, and so tend to be less capable.
Having said that, mobile chip-sets have focused on improving graphics performances for the last several years, and a modern laptop will be much better than one just 3 years old. One with a dedicated graphics chip from Nvidia or AMD will tend to give the best graphics performance (I prefer Nvidia drivers), but the very latest Intel integrated graphics are getting there.
The first character of the Intel chip code gives the generation, so i5-6xxx is 6th generation (Skylake), 5xxx is 5th (Broadwell), etc..
The latest Skylake CPUs (6xxx) claim integrated graphics twice as fast as the previous Broadwell (5xxx), which was faster than Haswell (4xxx), Ivybridge (3xxx), sandybridge (2xxx). If it only has 3 digits it is first generation (Nehalem), e.g. i5-750. There was roughly a year (or slightly more) between each generation.
If you are buying a new laptop and can't afford a dedicated graphics chip-set, it is worth looking for one with a Skylake CPU (i3-6xxx, i5-6xxx or i7-6xxx) if you can, as the graphics performance (and battery life) should be much better than an older chip, and at very little extra cost. I would avoid anything with a lower CPU, say a Pentium or (spit) Celeron, and I don't know much about AMD processors.
Anything with a dedicated graphics chip from the last several years should be more than capable of running bkool sim.
Geoff