Suddenly browser was unable to resolve names.
G:>nslookup rbc.ru
DNS request timed out.
timeout was 2 seconds.
Server: UnKnown
Address: 192.168.1.1
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
At the same time connection was fine:
G:>tracert -d 8.8.8.8
Tracing route to 8.8.8.8 over a maximum of 30 hops
1 <1 ms <1 ms <1 ms 192.168.1.1
2 1 ms <1 ms <1 ms 10.65.255.177
3 1 ms 1 ms 1 ms 86.110.173.65
4 1 ms 1 ms 1 ms 86.110.173.9
5 1 ms <1 ms <1 ms 86.110.185.87
6 1 ms 1 ms 1 ms 93.189.12.34
7 1 ms 1 ms 1 ms 188.43.23.226
8 1 ms <1 ms <1 ms 188.43.31.146
9 1 ms 1 ms 1 ms 188.43.31.129
10 18 ms 18 ms 18 ms 217.150.44.6
11 18 ms 18 ms 18 ms 217.150.44.9
12 19 ms 18 ms 18 ms 108.170.250.97
13 18 ms 18 ms 18 ms 64.233.174.219
14 18 ms 18 ms 18 ms 8.8.8.8
Trace complete.
Then I stopped avast, using its own GUI and DNS immediately restored
G:>nslookup rbc.ru
Server: router.asus.com
Address: 192.168.1.1
Non-authoritative answer:
Name: rbc.ru
Addresses: 185.72.229.9
80.68.253.9