The model of the laptop is an MSI GX740-235US
I'm fairly confident that it's not an antivirus program issue, as both the other PCs I tested this USB had the same anti virus software as this laptop had (AVG 8). Now I use Avast, no difference in speed.
EVERY USB port on the laptop has the problem, including the USB/eSATA hybrid port.
I do have another 'pen drive' (USB Stick lol), but it in general has slow write/read speeds, as it maxes about 10MB/s write speed, regardless of the PC. I'll test the USB stick AGAIN on other PCs when I get it back. I do have another of the same model which belongs to my brother, so I'll test that one out on here too. Drivers
shouldn't technically be an issue, as with outdated drivers both the other test PCs/laptops used whatever drive came on the USB stick. Anyway, Kingston is making it extremely hard to find drivers for it, as they don't sell the USB anymore.