How do I get my Samsung Note 3 to be recognized by my PC? When I plug my phone into my PC (which is running Windows 7 OS) only charging takes place. When I view my phone in Device Manager, it says that Samsung Android files are not installed. But I installed those and also tried with Samsung Kies 3 but it's still not getting connected.
First, what you want to do ? Transfer files to the phone or make something with ADB and stuff.

Good that you have Kies 3 installed.
If transfer files. Check this: when you connect the phone there is a popup on the upper bar, sometimes you need to click it and change it to 'transfer files' - then the phone will go into MTP mode which allows you to view it in "My computer"

If make something with ADB: first try to install maybe Naked Drivers (it worked for me note 1 on win7):
http://forum.xda-developers.com/google-nexus-5/development/adb-fb-apx-driver-universal-naked-t2513339
, then enable debug in settings. When debug is enabled when u connect the phone it should ask for driver.
Also in bootloader and fastboot there is another driver needed but it sgould be in Naked or Kies drivers, also Android SDK have drivers.