How long have you had this computer? Is your other computer a laptop or desktop?
On paper the specs looks quite good, an i5 CPU and 6Gb of memory. However laptops do run slower than desktops, with slower CPUs, slower hard disks etc.
I know Samsung have now pulled out of the laptop market totally so do wonder if they put as much effort in to their laptops if they knew they were pulling out of the market.
Note also if you run a laptop on battery rather than mains it can often run slower as Windows will slow the CPU down to preserve battery life.
I don't have an answer to your problems, the laptop SHOULD be fast, based on the specs, but it could be a number of things (slow computer, bad wi fi connection etc)