1 month now I have exact the same problem.
I am owner of an AlienWare M17x r4.
My wireless network card is a Killer and use drivers from Qualcomm Atheros Osprey.
I use more than 1 year now Windows 8 (64bit) and the last 6 months I use Windows 8.1 (64bit).
I see every day 3 different SmartPhones and PhabletPhones connect to my network different hours.
Every time that I see is the above models connected to my Netwrok folder as phones.
- LG NEXUS 4.
with the above MAC addresses:
00:11:F6:8E:7E:72
98:d6:f7:96:6c:6c
- occam.
- LGE DTV BCM20702A1.
- SONY C905_1274-5549.
with the above MAC address:
b4:52:7e:df:fe:c5.
- JIAYU JY-G3.
with the above MAC address:
00:08:22:10:44:57.
and others too.
I use rooter TP-LINK TD-8961NB with firewall enable, WPA2-PSK AES, MAC address filter activated.
I use Avira Ultimate Protection Suite and Malwarebytes Anti-Malware.
I am doing every day full scanning for viruses and malwares and Microsoft Safety Scanner and doesn't show any problem.
Every time when I see in network folder 1 of the above devices something happen and I lost connection from the internet.
Then I am waiting for 1 minute and I am connect to the internet again and some of the devices are not showing for awhile.
I don't know where is the problem but sure there is a problem.
The problems might be windows security, might be wifi drivers, might be router backdoor, might be something else....
Please help !!!!