jwretl.exe and wmbcsftav.exe

A computer in my house had five system config modifications made by jwretl.exe and had network resources accesed by wmbcsftav.exe a couple days ago.  Since that point, the computer can log onto the network but cannot surf the internet. 

 

I searched the web for both executables and couldn't find anything, so it's making me think it's an infection.  I can't update Norton (which was updated within the last week anyway) since I can't get to the internet.  A full scan shows nothing.  I searched files and folders for both .exes and can't find them.

 

Help?  Thanks in advance.