STUPID PC!!

Been very vexed up these days..stupid pc having prob..cannot seem to go online via wireless network..kept sayin no IP address given..yet changing router din work..but modem is in workin condition!!haiz..now end up need use a stupid 5m wire to connect the modem to my pc, bypassing the stupid wireless adapter..wasted so much time n effort..n not forgetting money still cannot b done..can s/one out there help me???!!!!AAAARRRRRGGGGGHHHHH!!!!!!!!!!!!!