Cleaning house - here it goes (I apologize for the gigantic pictures - it does show more detail...but I can change it if requested):
Kingston 8GB (2 x 4GB) 240-Pin DDR3 SDRAM ECC Unbuffered DDR3 1333 (PC3 10600) Server Memory Model KVR1333D3E9SK2/8G SOLD
$50/each 4 available $150 for all...
I have always been a fan of Microsoft Security Essentials. I think it is less bloated - but I also like the fact that they don't trick people into "renewing the subscription" like AVG.
We used to have a scheduled task that performed some cleanup on a monthly basis. About a year and a half ago we rolled out Windows 7 and took away user's admin rights, man - that was extremely challenging but has made a huge difference.