Kevin SG wrote Is the router connected to the modem by cable or wifi? If it is by wifi, how far is it from the modem? Can you still connect to the modem's wifi and get internet? How about if you...

Enson Loo wrote From the description it seems the router died when it drops connection. Did you try reset the router to factory default? If you have tried that and still same issue, it's better to...

You should learn SD card to know SD card.

thanks for the answer: I'm using windows 7. since i did the update nc 220 i changed the program screen and the recording and audio keys disappeared ! Thank you so much ! You can help me

M Diamond wrote TL-WN851ND is old and it seems that it even doesn't support Windows 8 or 8.1. Hard to say if there is any update for Windows 10 in future... i agree with you !

try change a USB ports - good idea