Since I got the 7260 working by installing a newer driver from Intel, I decided to check the other, newer card I had.  It is a Wi-Fi 6 AX card from Fenvi, Model MPE-AX3000H. If you want to look at this, make sure and verify the form factor for yourself.  The performance of this card will, depend on the other equipment you have, such as your router. The card is equivalent to a Intel AX 200 Wi-Fi 6 card and also seems to work fine on the 1545.  I was showing a link rate of 144/144 Mbps while using a 2.4 GHz radio due to WPA2 security restrictions.  Now, with the new card, on my 5 GHz AX router I am getting 2401/2401 Mbps when it has a strong signal.
My 1545 running Windows 10 cannot install the bluetooth driver that DELL gives for WIN7. Is there a solutopn to this problem?
INSPIRON 1545 bluetooth driver for WIN10