Looking good,
You have remnanents of Norton on your PC and not a good idea to have 2 anti-virus programs. you have AVG free anti-virus so let's get rid of the Norton. What do you think?
Here is a link for a tool by Norton for removal of all components of Norton.
http://service1.symantec.com/SUPPORT...05033108162039
Also...
Now reboot into safe mode by
tapping your F8 key upon restart and safe mode screen appears, select safe mode and press enter.
Hunt for and delete this file:
C:\WINDOWS\system32\
pnujrmfg.exe
Reboot normal mode and tell me how your computer is behaving now please.