First of all I must apologize for not getting to your HJT log sooner.

The first thing I notice is you are running two anti-virus programs on the computer, Norton and AVG. This is an absolute no-no. Before you do anything else you must UNINSTALL one of them. If your Norton is still current then LEAVE it on the computer and uninstall AVG. If the Norton has expired then UNINSTALL that one. But one of them must go, immediately and completely.

Go through Add/Remove to begin with and do an UNINSTALL of every listing for the anti-virus program you are removing. Reboot the computer if prompted to do so.

THEN go to Start, Search, Files and Folders and do a search for any files remaining related to the program you have removed. If you have removed AVG then first do a file search for AVG. Delete all found. Then do a file search for Grisoft and delete everything found.

If you have uninstalled Norton then first search for files named Norton and delete all found. Then do a file search for Symantec and delete everything found. Reboot the computer.

You also have disabled something using msconfig. Please go back in and re-enable everything you have disabled using msconfig. We need to know everything on the computer.

Internet Explorer was also running during the scan, please turn it off before you run HJT.

This entry,
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office\OSA9.EXE shows that Microsoft Office is still listed to start up on your system. This is probably why the installed keeps coming up. The computer starts, looks for Microsoft Office and when it cannot find it then the installer runs to install it so that it can be started.
Open My Computer, double click "C" drive. Navigate to the Program Files Folder and see if the folder, Microsoft Office is still there. If it is then you know it has not been totally uninstalled.Open the file and see if there is an uninstaller program listed there, if so, go ahead and try to use it. If it doesn't work, don't worry about that now.

Do the uninstall of the anti-virus program. Go into msconfig and re-enable everything you have disabled in Start Up. Once that is completed then reboot. If the installer runs just let it go for now.

Be certain that ALL unnecessary programs are shut down and run HJT again.
Place checkmarks next to these entries if they still remain in the log;

O4 - HKLM\..\Run: [AlcxMonitor] ALCXMNTR.EXE

O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office\OSA9.EXE

Once you have placed the checkmarks then click the FIX button.
Exit HJT and reboot.

Then run a NEW HJT scan, with all unnecessary programs still turned off and save the log and post it here. We will see if there is anything remaining we must deal with.
Judy