Since this is a combo, Bluetooth* and Wi-Fi share the same antennas and this may impact directly on the Wi-Fi throughput. The recommendation is to disable Bluetooth* if not necessary so you can have all the antennas dedicated to W-Fi. There is this article online refering about Wi-Fi and Bluetooth* coexistence that may be very informative about this subject: Wi-Fi and Bluetooth coexistence
*NOTE: This link isbeing offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.
Even though there is a possibility for them to coexist, they will always use the same antennas. If you are going to have an intense use of Bluetooth*-connected peripherals but, also needs to have a high throughput at the same time, you might consider the option you have informed above about getting an independed Bluetooth* adapter.
We apologize for any misunderstanding in our previous response. What we mean is that Bluetooth* and Wi-Fi share the same antennas, you can use both at same time as needed but, because they share the same antennas, Wi-Fi performance may decrease because the antenna will also be busy using Bluetooth*.
We recommend that you contact the computer manufacturer if this wireless adapter is the one installed by factory in order to check if they have any available solution for this issue.
As a second option, you can optimize your connection by following:
1 - Disable Power Functions: Control Panel >> Hardware and Sound >> Power Option >> Set the High Performance and apply to default.
2 - Check the Change Plan Settings: >> Change Advanced Power Settings >> Wireless Adapter Settings >> Power Saving Mode and make sure both on Battery and Plugged in are set to Maximum Performance.
3 - On Device Manager >> Network Adapters >> Intel® Dual Band Wireless-AC 7260 and then select and right click on it, then choose Properties.
4 - On Property, select the Advanced tab and set the U-APSD support to Disabled.
5 - Check the value of transmit Power and make sure it is set to 5. Highest.
6 - Change the current channel used to a less crowded one on the router.
7 - Set the Wireless Mode to 802.11a/b/g/n according to that of the supported mode on your router.
8 - Set the preferred band to Prefer 2.4GHz band.
9 - Set the HT Mode to HT.
10 - Set the Channel Width for 2.4GHz to limited 20MHz
Thank you for the detailed response!
Unfortunately, it didn't help anything. My best guess is that since a lot of people hardly use Bluetooth, Intel didn't bother to build a well working device.
(However, I don't understand why the combination of WiFi and Bluetooth works flawlessly in my phone - apparently it is possible...)
ASUS wants me to send in my laptop for two weeks, which is not possible for me, so I will buy a Bluetooth USB adapter.