Windows 7: lose of internet connection..

Hi basically i got a virus and now iv finally removed it successfully my internet wont work.. where i plug the ethernet into my network card the light used to be solid but now it flashes (blinks) instead. and also the light on my router indicating theres an active ethernet cable in the port isnt coming on anymore.. if i run a diagnostic it say the cable isnt plugged in. i kno its a working cable because it works with my ps3. ive reinstalled my os but no luck.