I just installed P8 yesterday..with SR2
i have to say it slows my entrie system down with it loaded and sitting idle. It is extremely more intrusive than P6 for sure. must use a lot more memory resources, and I dont have many as it is..1.5gig plus virtual.

Humankind has not woven the web of life. We are but one thread within it.
Whatever we do to the web, we do to ourselves. All things are bound together.
All things connect......Chief Seattle, 1854