Роутер dir-300
Клиент - стационарный комп с dwa-510
Проблема где-то в клиенте, потому что еще два беспроводных клиента работают абсолютно нормально.
На клиенте стоит хрюша.
Сеть без шифрования с привязкой по маку.
Прошивка на роутере обновлена. На карточке стоят последние дрова.
Когда пропадает инет, то клиент выполняет процедуру исправить.
Connect Time MAC Address Mode
6 hours 29 minutes 57 seconds 00:1E:58:A4:D3:41 11b

В логах роутера.
Jan 11 16:50:38 DHCP: Server sending NAK to 00:1e:58:a4:d3:41.
Jan 11 16:50:38 DHCP: Server sending ACK to 192.168.0.103. (Lease time = -1)
Jan 11 16:50:38 DHCP: Server receive REQUEST from 00:1e:58:a4:d3:41.
Jan 11 16:50:38 DHCP: Server sending OFFER of 192.168.0.103 for static DHCP client.
Jan 11 16:50:38 DHCP: Server receive DISCOVER from 00:1e:58:a4:d3:41.
Jan 11 16:50:34 DHCP: Server sending OFFER of 192.168.0.103 for static DHCP client.
Jan 11 16:50:34 DHCP: Server receive DISCOVER from 00:1e:58:a4:d3:41.
Jan 11 16:50:34 DHCP: Server sending OFFER of 192.168.0.103 for static DHCP client.
Jan 11 16:50:34 DHCP: Server receive DISCOVER from 00:1e:58:a4:d3:41.
Jan 11 11:25:54 DHCP: Server sending NAK to 00:1e:58:a4:d3:41.
Jan 11 11:25:54 DHCP: Server sending ACK to 192.168.0.103. (Lease time = -1)
Jan 11 11:25:54 DHCP: Server receive REQUEST from 00:1e:58:a4:d3:41.
Jan 11 11:25:50 DHCP: Server sending OFFER of 192.168.0.103 for static DHCP client.
Jan 11 11:25:50 DHCP: Server receive DISCOVER from 00:1e:58:a4:d3:41.
Jan 11 10:52:11 DHCP: Server sending ACK to 192.168.0.103. (Lease time = -1)
Jan 11 10:52:11 DHCP: Server receive REQUEST from 00:1e:58:a4:d3:41.
Jan 11 10:52:07 DHCP: Server sending ACK to 192.168.0.103. (Lease time = -1)
Jan 11 10:52:07 DHCP: Server receive REQUEST from 00:1e:58:a4:d3:41.
Jan 11 10:51:54 DHCP: Server sending NAK to 00:1e:58:a4:d3:41.
Jan 11 10:51:54 DHCP: Server sending ACK to 192.168.0.103. (Lease time = -1)
Jan 11 10:51:54 DHCP: Server receive REQUEST from 00:1e:58:a4:d3:41.
Jan 11 10:51:54 DHCP: Server sending OFFER of 192.168.0.103 for static DHCP client.
Jan 11 10:51:54 DHCP: Server receive DISCOVER from 00:1e:58:a4:d3:41.

а в event viewer есть что-нибудь по этому поводу?