[quote="Spielwurfel]
Thanks!! After I format my PC again I'll try the links!
Well... Here's a layout of the internet connection in my house...
Antenna------------->PC with direct connection-------------->My PC, the one with problems
I already tried to shut down all firewalls, formatted my PC lots of times and tested the internet with SP1 and SP2... Nothing else...
[/quote]
Spielwurfel
So what is that antenna? Is that a WiFi or WiMax connection? Or is that Satellite like Direcway? Also what is between PC With Direct Connection and My PC? Is that just a cross-over cable? Or is that a 10/100 Switch Hub?
Before you format... are you able to try any other computer on that same connection where My PC is currently at? Anything would do, borrow someones laptop (even with them still attached to it ;-) for 10-15 minutes and jack into the CAT 5 10/100 connection.
That would at least give you a troubleshooting decision as to where the problem is.
1.) Test laptop works fine but My PC does not - The problem is in My PC.
2.) Test laptop does not work, has the same problems. - The problem is not in My PC but something in PC With Direct Connection.
* You might want to try something like WinsockXpFix which automates the uninstallation and re-installation of TCP/IP (registry keys Winsock and Winsock 2 - http://support.microsoft.com/kb/811259)
also there are so called LSP fixers. These kind of things can get screwed up by anything from Spyware/Adware to Firewall or other Tune up software that mucks with TCP/IP and LSP stuff.
There is also the old standby (less effective than WinsockXpFix, so probably try this first and then WinsockXpFix):
netsh int ip reset reset.log.txt
* Note: I have also seen trouble where I had to turn off Windows Internet Connection Sharing (ICS) on a Broadband Connection, reboot the ICS PC machine, and then re-enable it and reconnect. But that generally only fixes complete failure of the ICS processes like DHCP, DNS, and NAT/Routing that sometimes gets "stupid" on Windows XP.
Big P.S. You could also benefit from something I told someone else elsewhere on here. Get WinPCAP and Ethereal for Windows and capture your packets. You can also try basic network troubleshooting like PING and TRACERT to see if there is a path to the hosts you are trying to get to.
If the main computer is getting to Microsoft.com and MSN.com you'll see in the Ethereal captures the connection from your IP (or hostname) to Port 80 "http" ... you'll see SYN from you, SYN ACK from them, followed by you another ACK, and then then typically the http GET / request you send to them. Followed by all of the "crap" that comes out of MSN.Com. Yuck!!!!!!! Ad.doubleclick dot what?
Actually before the above TCP 3-way handshake there will be DNS request from you to your DNS Server for the "A" or Address record (the IP address) of the web site you are visiting.