I should update this topic because disabling IGMP didn't help. Then I disabled UPnP and it's working well! Before, I was also noticed that UPnP on W8960N V5 doesn't work properly, can't automatically...

No problem here. Did you enable UPnP?

Tony Seaford wrote Wow... does it solve your problem completely? Yes! [URL=http://imgbox.com/uBERIWGY]

boombastik wrote in advanced setup ipv4 config disable IGMP snooping Also in advanced setup in wan serviced push edit button and u must disable IGMP multycast proxy. Now your ruter will not restart....

I had no issue with W8960N v4 before. It works fine all the time but reboots when I set PC to sleep/shutdown.

No solution yet? :(