Why won't my Internet work on my Dell laptop?

I have a Dell Inspiron M5030 laptop with Windows 7. The Internet was working for a while and either something came unplugged inside or some connection isn't working. My iPhone and my sisters laptop work fine. I also tried to speed up my computer and uninstalled some things. I may have accidentally uninstalled the Atheros adapter. But when I go to check, it's there she times and sometimes not. Any help? Thanks!

Added (1). Thanks what do I did from there? And I have a wireless connection.

Try unplugging

Click Start -> type Device Manager in the box and hit enter.
Click on any entry on the list, then go up to Action, then pick Scan for Hardware changes.
How do you connect to the internet? Wireless or wired?

  • Why won't my iPhone 6 download pics to my Dell laptop? Every time I plug my phone in to my laptop it always pulls up "import pictures/videos" well now when I plug my phone in it won't do that anymore. I don't know why. I need to get these videos on my laptop, but i don't know how. My laptop is a pink Dell laptop I think it's windows 7.
  • Why do I have to restart my Dell laptop to reconnect to the internet? I have Wi-Fi internet with Charter but we have a lot of connection problems. My ipad and iphone automatically reconnects as soon as internet if availible again but my laptop has to be restarted for me to get back on the internet is there something I can change in the settings to fix this?
  • Using Personal Hotspot with my DELL Laptop? Ok, so this idea just hit me. If I turn on the "Personal Hotspot" on my iPhone 5c (with 3G service on), and connect it to my computer via USB, will it make my laptop internet faster as well? The 3G service is So much more faster on my iPhone 5c than on my DELL Laptop! So will this help my laptop if I select my iPhone on the internet connection?
  • Iphone 5 won't sync to my dell laptop with windows 8? It doesn't give me an option for a music file, just photos? Help I was originally trying to move my music from my ipod to my laptop and then transfer to my iphone?