"type the exact wording i.e 'NTOSKRNL.EXE' in google, this will then tell you exactly what it is as its more then likely to be a processor but you can never be to sure. I have just typed it in google and it says it is an essential boot up process to your system...so dont block it!!!"
what on earth?
The traffic is INCOMING, the firewall is working as it should!
If firewall is blocking incoming traffic then it is indeed doing it's job correctly. Stopping any incoming traffic will not prevent the pc working properly. By letting in sometning not wanted just might.
Try doing a search at click here virus vault for SVCHOST.EXE.