I'll give ccleaner a try.

dual boot...that would be best, but cannot afford to buy new hard drive now, and my current is full pretty much, so that will not be possible to have 2 OS and possible 2 sets of programs. IMO , however, booting into a clean system would be ideal.

If I can ever buy a new system, it will be offline and my current unit would be for online use.

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