It seems to be a routing issue somewhere
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\Dave>tracert
www.xbox.com
Tracing route to msxbwsd.vo.llnwd.net [87.248.211.187]
over a maximum of 30 hops:
1 39 ms 100 ms 98 ms bebox.config [192.168.1.254]
2 * * * Request timed out.
3 * * 14 ms 10.1.3.234
4 * 26 ms 27 ms 10.1.3.214
5 * 21 ms 21 ms 10.1.2.158
6 37 ms 27 ms 31 ms 206.165.73.37
7 35 ms 28 ms 25 ms LIMELIGHT-NETWORKS-LLC.TenGigabitEthernet1-2.ar4
.LON3.gblx.net [64.209.95.198]
8 22 ms 15 ms 22 ms ve6.fr3.lon2.llnw.net [68.142.88.222]
9 19 ms 16 ms 22 ms cds257.lon.llnw.net [87.248.211.187]
Trace complete.
C:\Users\Dave>tracert
www.live.com
Tracing route to home.skyprod.akadns.net [65.55.124.223]
over a maximum of 30 hops:
1 95 ms 98 ms 99 ms bebox.config [192.168.1.254]
2 * * * Request timed out.
3 * 16 ms 7 ms 10.1.3.234
4 * * * Request timed out.
5 28 ms 26 ms 16 ms 10.1.2.158
6 34 ms 27 ms 34 ms 206.165.73.37
7 104 ms 89 ms 105 ms MSN-HOTMAIL.TenGigabitEthernet4-2.ar6.NYC1.gblx.
net [64.214.149.202]
8 96 ms 97 ms 96 ms ge-1-3-0-0.nyc-64cb-1a.ntwk.msn.net [207.46.47.2
12]
9 102 ms 104 ms 94 ms xe-10-2-1-0.bl2-96c-1b.ntwk.msn.net [207.46.45.8
4]
10 93 ms 100 ms 110 ms xe-1-0-0-0.bl2-96c-1a.ntwk.msn.net [207.46.46.18
4]
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 ^C
www.live.com is the core of all Microsoft authentication I think?