Your computer does have malware on it.
You may be able to install and update MalwareBytes AntiMalware to find and remove the malware.http://www.bleepingcomputer.com/forums/ind...st&p=944365
Some other problems such as not being able to use the printer because of using system restore may be more difficult to solve. (Cannot find application lxdnMsdMon.exe)
There is also a reference to AVG (Cannot find INSTALLAVG_77015105.EXE.) Did you install this after Norton would not scan?
At this point it might be the best, if not the only route to take, is to do a reformat and reinstall. Up to you.
Here is some info on System Restore:
If you perform a restore operation and then determine that the problem still exists, you can undo the operation. To do so, you must immediately run System Restore. When you see the Welcome To System Restore screen, select the Undo My Last Restoration option and click Next. On the Confirm Restoration Undo screen, click Next. System Restore will restore the previous system state and restart the computer. When the system restarts and you log on, you'll see System Restore's Undo Complete screen, which lets you know the operation was successful.
If you perform a restore operation and then determine that you selected the wrong restore point date, simply run System Restore again and select the restore point date you wanted.
If you perform a successful restore operation and discover that your computer won't boot Windows normally, you can still undo the restore operation. First, boot the system into Safe Mode. After you log on, a Warning dialog box will appear, allowing you to launch System Restore and select the Undo My Last Restoration option.
If the restore operations fails, the Restoration Was Unsuccessful screen will appear, and your computer will automatically return to the same state it was in when you activated the restore operation. In other words, no changes will be made to your computer.