No response DHCP server

Question

Hi All all new to this  hope you can help!!!
 set my new laptop  to wireless network and all was fine ,till windows updated  and having all sort of problems connecting to the net .did a manual diagnostic tool  when i tryed to connect and no good and failed in ping test - no response DHCP server.I dont know why because it was all working good before no now !! murray
 ps  all new to wireless networking  please be kind.

Answer 1

its for my laptop went and got a linksys wireless router WRT54PG2-EA set it up and all worked fine for two weeks,the other day when i turned my laptop windows ( VISTA) and norton internet security  updated still worked fine didnt turn the computer off at all come back after a hour, cant get on the net ,at that stage rang linksys 24 hour techical support pluged my laptop to the router  via network cable they cheaked  it and all fine . when i unplug the network cable it can find a wireless network - connect to net work  can no do comes up SECURITY-ENABLED NETWORK ok then i did a manual diagnostics  fails on the ping test (useing vista )pluged the network cable and let the windows fix the problem,done that ok unplug the network cable try to connect  no good by that time my hair was falling out not that i have much hair left-come up NO RESPONSE DHCP SERVER.
When its all pluged via network cable  the internet works fine it the wireless side of things.
Do i get hold of my ISP or microsoft ,Linksys or Toshiba because i do not know !!!
Murray thank you .