Norton AntiVirus not opening

Hey guys. So this is the first time this has happened. I tried opening Norton Antivirus and nothing happened for a good minute or so then a pop up comes up and says, "Sciter default loader cannot find: /standard". Then I click ok and another one pops up and says, "Sciter default loader cannot find: /std_frameless_UI". I kept clicking ok and it shows the same two messages in an infinite loop, until I end the process: symer.exe *32 Symantec Error reporting. I also  tried restarting my PC but it didnt help. I'm willing to reinstall if necessary.

 

Bought Norton AntiVirus 2011 in August 201 but was allowed to upgrade to 2012 version.

System specs:

HP 2000-219dx Notebook PC

Windows 7 64bit

8GB memory

298GB

AMD E-350 processor

AMD Radeon HD 6310 Graphics

 

Any help would be great. Thanks!