Rule rejected TCP(6) every 10 seconds

Started off as 4x "Rule  rejected  UDP(17)" every 10 minutes then 8 of them every minute, now it's "Rule rejected TCP(6)" every 10 seconds.

For the past 2 years their have been wireless devices connected to the network such as mobile phones, tablets, and laptops of the 2 other people that live in the house and it's only in the past few days that my computer has been under attack by a device connected to the network, now my computer is the only one connected directly to the modem via cat 6 cable and has no wifi receive or transmitter. this is what the attack looks like and the more days go by the more often it happens and more aggressive it gets.

Category: Firewall - Activities
Date & Time,Risk,Activity,Status,Recommended Action,Category
1/04/2015 1:37:03 a.m.,Info, Rule  rejected  TCP(6)  traffic with  (192.168.1.254  Port (39709) ),Detected,No Action Required,Firewall - Activities
 Firewall rule was matched:<br> Rule Name: Default Block SSDP<br> Rule Action: rejected<br> Rule Severity: normal<br> <br> Traffic Details:<br> Protocol:  TCP(6) <br> Direction: inbound<br> Local Host: NEREVAR<br> Local IP: 192.168.1.69<br> Local Service:  Port (2869) <br> Remote Host: <br> Remote IP: 192.168.1.254<br> Remote Service:  Port (39709) <br> Remote MAC:  -- <br> Adapter Index: 11<br> <br> Process Information:<br> Process ID: 4<br> Process Path: System<br>

Each time the "Remote Service:  Port" number changes.

I'd like to know if this is because one of the devices on the network is infected with a virus, also on my network settings all devices are set to restricted and have been like that for the past 2 years.

The "Remote IP: 192.168.1.254" is the Modem itself.