Not sure if this might help click here
The other thing that you might consider, is if you have enough memory ram for Windows 7?.
Have you downloaded or installed any new programs recently ie spyware etc?.
WPA2 hack: How secure is your Wi-Fi?
Add Depth Of Field to a photo using Tilt Shift Blur in Photoshop
iPhone tips & tricks
Comment afficher des fichiers cachés sur Mac ?