installed divx and got a directory symantec and SymInstallStub installed

how do I remove this.  No obvious uninstall in control panel program uninstall.  It also has a runonce in the registry.  google search shows up people having problems with boot  after manually removing probably because of the runonce.  I uninstalled the dirx and it did not really remove this it changed the SymInstallStub.exe to Symantec.exe in the symantec directory under dirx.   not sure what this program does cannot find info with google search just people having problems with it.  Why Divx would install it to begin with.  I would like to reinstall Roxio Creator 2012 at some point which also installs the dirx.  The dirx update to the latest put on the symantec dir and stub program.  Please tell me what this is and why its doing a runonce?  and how to un-install once if it gets reinstalled again.   This is a brand new PC with 64 bit win 7 and I dont want anything Symantec slowing down my machine and boot up.  Just say no to bloatware