Andrew,
Something that requires your immediate intervention. I notice that you have more than one anti-virus programs on your machine (AVG & Symentec). That's not a good idea!!
This messes up the machine pretty badly. Alike firewalls, anti-virus programs have conflicts co-existing with each other & may produce undesirable results. Please
uninstall ALL leaving only one of them.
ALL the antivirus programs
must be removed via add/remove program.
For any program that doesn't have an add/remove entry, you will have to do this:
re-install the program -> reboot -> uninstall
Please post a new log after doing so.
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