In a followup of my post of July 7th., the solution I mentioned by reverting to 15.6.1.20 did not work.
After several days, the problem with the old TP-Link TL-WR941ND are back.
So my story is :
1. same notebook, same wireless card, same routers, original drivers (15.6.1.20) > everything was OK
2. same notebook, same wireless card, same routers, upgrade to driver (15.8.0.5) > problems with router TL-WR941ND
3. same notebook, same wireless card, same routers, rollback to driver (15.6.1.20) > problems with router TL-WR941ND
4. same notebook, same wireless card, same routers, upgrade to driver (15.8.0.5) because the problems are there anyway.
Listen Intel : In the TP-Link TL-WR941ND location I must now connect using a wire !!!!!!!!!!!!!!!!!! Kudos for your products and your quick and efficient technical support !!!!!