As a computer support specialist I would say that Windows 7 Upgrade has brought issues in volume, than others. "No sound issue" is one of those.Probably it seems that next generation is getting crazy over entertainment. As people come who straight forward say that their YouTube or iTunes is not working.
There are a host of actions that system administrators can and should perform to ensure that their computers are not compromised. The netstat command line tool available on both Linux and Windows generates a list of open connections on your system. However, for any personal computer user, the amount of information generated by this command prompt can be overwhelming and unhelpful.