Slow wifi only on one PC (HP Envy dv6)

Hello everyone,

Let me start off by saying whats wrong. Every since I've had this computer I have had an issue with connectivity. I have gone through several different troubleshoots with HP as well as looking through countless forums and webpages and none of them seem to help. When doing a speed test online I get about 15-18 mbps. However, when running the test on all other laptops through the house they get 50-55 mbps. Which is very frustrating. The most frustrating part is that when plugged into the router through an Ethernet chord, I get the normal 50 mbps. The service we have is from Comcast Xfinity and it is one of the highest services you can get I'm pretty sure. I'm not sure but I think that rules out any ISP issues.

Here are some more steps I have tried:
- Installed the recent BIOS
- Installed all drivers
- Check the cables on the wireless card
- Uninstalled and re-installed the wireless card

That's pretty much all I've tried and I'm starting to think the Wireless card is fried. Which if that is the case, I'd rather figure out for sure so I don't go spending money for no reason.

Hope y'all can help me out!

Thank you!