You have made quite a number of incorrect assumptions; the information you have provided based on those assumptions gives no hint of any
attack or infection of any sort.
For example, S-1-5-19, S-1-5-20, and the others are well-known, documented, and vital parts of every Windows install.
They are identical
across all versions of Windows and do not
change simply by reinstalling. They are by no means
an indication of successful or even attempted
hacking attacks in any way, shape, or form. It is the equivalent, in physical-world terms, to saying that since your front door has a lock on it, you must have been robbed.
You also state that you've reinstalled various operating systems, even non-Windows operating systems, an obscene number of times on an absurdly large collection of hardware. As a rule, software is specific to a particular machine environment
and are not portable across environment paradigms without extensive and difficult modification. The most successful example of a malicious program extending to affect more than one machine environment is the Stuxnet worm, which most agree must have been the strenuous
effort of a wealthy government. To be blunt: it's almost a certainty that attacking your computer in the method you are perceiving is economically impractical for any adversary unless you happen to be storing nuclear weapons secrets or you have an on-going personal blood feud with Bill Gates.RIPE
is the Regional Internet Registry
for Europe and the Middle East. What that means is that everyone on "the internet" in that region of the world is part of RIPE, because RIPE is
"the internet" in those regions.
Edited by Andrew, 18 April 2012 - 04:18 PM.