Less start first by Welcoming you To The Seven Forums. . .
Now the first question, then we'll go from there. Have you attempted to do a system restore. If not attempt to do that first. You can do this two ways: 1) go into your start menu then down to "Accessories" then to "System tools" then finally to "System restore." This can only be done in Windows. This will restore your system back to a time when you weren't having problems. If that doesn't help please post back so we can look in another direction. Good Luck