Wont connect to internet but will connect to wifi

Registration date
Friday September 18, 2015
Last seen
September 18, 2015
- Sep 18, 2015 at 10:35 AM
Please help.
I have a Dell studio laptop I've had it since about 2008. Just about a week ago, my laptop started acting funny. The screen flickers if I move it just right. But that's not all.....it connects to wifi but when I go on both Google chrome and Firefox and internet explorer I type in the website but when I hit enter. It doesn't go to the website it starts downloading something. When I look at what its downloading it only says "download" on it doesn't say what it is or what it's for. Please help me I need my laptop to work for school.