I used hijack to get rid of some nasty spyware crap that I had on my computer years ago. The sad thing is you have to recognize what is good or bad and if you aren't a computer guru you could actually screw stuff up. I think the stuff that has 04 in the front you can eliminate if and only if you believe it is not needed or garbage. Sometimes you can tell suspicious crap just by reading it but is is defintely great software is used correctly.
I can't explain it... has a mind of it own. Sometimes adobe just consumes the machine. I installed a new printer and even when I did not install the majority of the extra all these extra process are running.