The first two will definitely work, and I have used both on systems older than yours with Windows 10. The third one, while its maximum speed is somewhat higher than the 6230, is only a 1x1 card, so maybe not the best choice. Of those, the 7260 would be the best performer if you have a decent 5 GHz network. For 2.4 GHz, it may be similar to the 6230. Windows Update will provide the required drivers for the 7260 or 6230, so you won't need to manually install anything. Whenever touching components or working inside a computer, wear a grounded wrist strap, also called anti-static wrist strap, ESD wrist strap, or ground bracelet. It's a cheap and sensible precaution. Rest the laptop on an anti-static mat or at least a reasonable alternative such as corrugated cardboard.
I now need to replace the old Intel Centrino N-2230 wireless card in my Inspiron 17R 7720 SE Core i7 laptop.   Win 10 upgrades have deleted this card's entire WLAN -Bluetooth connection -  and I can not connect to any device or network.   After doing some research I think I found some potential upgrades for the N2230 card.   I just need to know which would work the best to restore my lost  Bluetooth capabilities, which has totally disabled my Logitech mouse  & speakers, and my Bluetooth mic/headset!   My current replacement choices are the following: Intel Dual Band Wireless-AC 7260 ac WiFi Bluetooth Half Mini Card Intel Centrino Advanced N-6230 WiFi Half Mini Wireless Card Intel 3160 Dual Band Wireless AC + Bluetooth Mini PCle card   I would appreciate any help or suggestions I can get & ASAP.   Richard - Bummed Out With Microsoft in LA  
RE; Replacing my Intel Centrino wireless N-2230 WLAN card