Is your wireless card a Intel® Dual Band Wireless-N 7265 or Intel® Dual Band Wireless-AC 7265?
Please try the following:
1 - Go to Control Panel >> Device Manager >> Network Adapters and select the adapter and right click on it.
2 - Select the tab that says Advanced and set the U-APSD Support to Disabled.
3 - Set the value of Transmit Power to 5. Highest.
4 - Set the Preferred Band to Prefer 2.4GHz band.
5 - Set the HT Mode to HT Mode for 802.11n compatibility. (VHT Mode is for 802.11ac compatibility).
Since you have tried the steps above and still did not work. We recommend that you contact your computer manufacturer to see if they have any updates that might help you with this if the wireless card was installed by factory. As a second option, you can try the following:
1 - Update the drivers on your wireless adapter, seek for updates with your computer manufacturer first. If not available at the moment, you can try the latest driver version found in our support web page: Intel® PROSet/Wireless Software and Drivers for Windows 7* - File name: Wireless_18.12.1_ Ds64.exe
2 - Check for possible firmware updates for your router.
3 - You can find the list of manufacturer here: Computer Manufacturer Support Web Sites
aleki_intel thanks for the help! I reached out to Lenovo, and they are going to try replacing the wireless card.
1. The interesting part of this, is that the driver version shown on the computer is 126.96.36.199, which is higher than the latest release listed on Intel's website (18.12.1) and as you noted. Is that possible?
2. Router is up-to-date & no other issues with other devices connected.
GattoNero I'm using AES only.