The cause could be anything from the network adapter to the wireless router to a bad network cable.I’m only going to mention a few of the major reasons here, but scroll down to the Other Troubleshooting Tips section if none of these fix your problem.
To disable Ultimate Windows Genuine Advantage (WGA) once for all, simply download and install WGA remover.And Redmond has turned on the afterburners in the past year, releasing a string of quality business-focused apps. Being a Mac user doesn't mean that you have to turn your back completely on the Windows ecosystem.There are a number of ways that you can run your favorite Windows applications on your Mac - and some won't cost you a penny. For the last six months most of my Vista updates have failed to install. The easier ones I have tried, with no satisfaction. Is there a piece of software that can fix this problem (as opposed to trying to follow Microsoft's instructions)? If you’re running Windows 8 or recently upgraded, you might have run into some frustrating Wi Fi issues.
Updated in August, 2012 – this version of WGA Remover is recommended for Windows7.