The webpage error

I get strange the problem on the family pc. the translation I can make for you as in english on this site. the network error is

Network Error (tcp_error)


A communication error occurred: ""
The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.

For assistance, contact your network support team.

but no connection error on the PC just the web sites. From the experience in the university I am tryed to use softwares like ccleaner, regcleaner, spybot and from friend the xoftspy good software. The machine is very clean and so much faster then before my started :P however the internet error is still there and cuasing many worries...

Can you make the reset of the internet browser for default? not the temporary files because that is done because of the describing above! :thumbup:

First off:
browser?
router?
Modem?
ISP?