no internet on windows 7

#1
hi, im new on this and im trying to get my internet connection to work, i have done every thing i find that might help me connecting to the internet but i cant,... i connected with a lan cable and it worked i toke of the cable and the internet was still working. But I placed it on its placed turned it on again and it wasn’t working, it isn’t a laptop, so I cant move it very easy, ther is good signal strength more than half, my brother has also windows 7 and he has good wireless internet. the pc shows something like un identified network.
 


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