VLC?
VLC is terrible. At least if you want to use it for home cinema playback. MPC-HC all the way! Mind you my setup is rather esoteric (ffdshow, MAdVR, LAV etc). I have way to play nearly every format in exactly the way I want (like auto switching HDTV refresh etc for PAL, NTSC etc).
I personally use AVG which works fine. I tend to switch based on the latest reviews though. I prefer XNViewMP beta over Irfanview right now (It displays transaparent PNG's correctly) although it can be a bit buggy on occasion.
I am not sure 7-zip adds right click context menus to Explorer. I like the way in Winrar you can right click and 'extract here'.
Oh and therer is some issue over whether Eraser will actually erase data on solid state storage such as flash drives due to the way wear levelling works. You may 'think' you erased the data but it cold be hiding in the redundant data portion of the memory still. just so you know.