Posted 09 August 2010 - 03:26 PM
The wireless speed on my laptop slowed down really suddenly a few days ago, and I can't figure out what's wrong. My boyfriend's laptop connects to the same wireless connection without any problem.
Here's a comparison of our speedtest.net results when I put our computers the same distance from the wireless router:
me: ping = 22 ms; download = 0.74 Mb/s; upload = 0.39 Mb/s
him: ping = 13 ms; download = 10.83 Mb/s; upload = 5.50 Mb/s
My internet works fine when I use the ethernet cable, whether i connect it directly to the modem or connect it to the router.
I've tried updating the driver for the wireless card, but that didn't seem to have any effect. I also ran the Lenovo system toolbox and used it to test my wireless card, but it didn't find a problem.
My card is the Intel Wireless WiFi Link 4965 AGN, and I'm using a D-Link router. I've had this same router, wireless card, and operating system for the last 2 years and never had any connection problems before.
The problem first started around the time Microsoft Security Essentials detected and removed a Trojan on my computer, but it removed the Trojan a few days ago and MSE hasn't found anything since then. I'm also not sure if there's even a relationship between the Trojan and the slow internet-- before the Trojan was removed, my whole computer was running slowly. Now, the computer is generally running at a normal speed, but it's just the wireless that's slow.
I'm really confused about what the problem could be, and whether it's in any way connected to MSE or the malware (but the slow internet persists in safe mode as well). Any help figuring out what's wrong would be greatly appreciated.