Sometimes random sites, which can be anything from a few specific sites to almost everything but Google, don't work. Since Google works whenever the internet does, I thought it might be a DNS thing, but it's not. Any ideas? Proxies do work so it seems to be the cable ISP.
format 
or perhaps try flushing your "dns cookies"
Command prompt -> ipconfig /flushdns
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:Documents and SettingsX>ping www.google.com
Pinging www.l.google.com [74.125.19.99] with 32 bytes of data:
Reply from 74.125.19.99: bytes=32 time=36ms TTL=246
Reply from 74.125.19.99: bytes=32 time=35ms TTL=246
Reply from 74.125.19.99: bytes=32 time=24ms TTL=246
Reply from 74.125.19.99: bytes=32 time=26ms TTL=246
Ping statistics for 74.125.19.99:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 24ms, Maximum = 36ms, Average = 30ms
C:Documents and SettingsX>ping www.msn.com
Pinging us.port.msn.com.nsatc.net [207.68.173.76] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 207.68.173.76:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
C:Documents and SettingsX>
Vec obviously needs to find tha computah room. 
Vec obviously needs to find tha computah room.
I'm still delirious with sleep. But that there made me laugh for some reason. Really.
C:Documents and SettingsX>ping www.msn.com
Pinging us.port.msn.com.nsatc.net [207.68.173.76] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.Ping statistics for 207.68.173.76:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),C:Documents and SettingsX>
I'm pretty sure Microsoft blocks ICMP echo requests on all of their network sites, so pinging a MS site shouldn't work even under normal circumstances.
I'm glad all of the info. here has been posted up, because this might actually be useful information to me someday, If I ever encounter this problem.
Um... great?
If you're not actually having the problem, letting everyone know it's POSSIBLE it might be useful later is, well, stating the obvious. You really don't need to tell everyone that.
I can't enter Electronicfiles.net for some reason. And PSX loooves posting those nutty little punchlines of his from there. = Also, Sonic Vegem;te haphazardly works and doesn't for me. *shrug*
I chatted to charter who said they reset my modem and it worked a half hour later.
