I deinstalled some software (e.g. some Toolbars for IE and Norton security suite, because the free trial period of 60 days is run out and so i want to switch to microsofts free security essentials). But now i cannot connect to the network again:

• Neither over LAN nor over WiFi.
• Neither with standard DHCP ON (sets a 169.254.x.y address) nor with fixed IP-Address.

No error during changing the settings. Ping to the Gateway e.g. doesn't work and gives "generall failure". The DHCP-Client sets no IP-Address. There is allways only 'local access' on every network-connection.

i ran out of ideas, please help.

UPDATE per 2011-03-11:

I followed each and every hint but nothing changed. I did a research on microsofts homepage through all the sites belonging to network but nothing helped.

What can i do next?