Hi, I own a 3-4 yr old emachine dsktop that I have added some components to in the last few mths. and was wondering if there was anything I need to know about in order to prevent a crash. I installed a second internal HDD (still boot from the orig.), 1 GB of memory, a new CD/DVD burner, and a 500watt power supply. About once a mth, I use the CCleaner to clean registry, Malwarebytes, and Adaware. I run NOD32 and Comodo, which works well. I generally use the PC to surf, play my 500GB of music, stream video and occasionally download from bittorrent. Is there anything else I need to be doing to protect my investment? Thanks for the help.