It's nearly impossible to be a software pirate on the Amiga any more. I mean, really. What are folks supposed to do - call up EA and ask them if they can register their copy of Deluxe Paint V, or The Immortal? And in exchange for what, exactly? You're not exactly going to get replacement floppies from them if one tanks.
Conversely, on the PC (speaking strictly for myself) digital copies of games especially through Steam are a real blessing. I have a moderately behind the bleeding edge system, and I'm picky about what I play, so for me there's no problem throwing down $5.00 for, say, S.T.A.L.K.E.R., etc. And the stuff I pay full price for is, to me, completely worth it. Valve's games are friggin' art. It's about rewarding good programmers.
OS wise (and this applies equally to games), you're asking for a punch in the mouth (so to speak) using pirate copies. Okay, fine, what exactly did you install? Was that ISO of XP, Vista or 7 just that OS? Or did you just install a pre-backdoored meeting place for every sort of malware and spyware loose on the internet? Same goes for pirated games; that NoCD crack you're running might have injected something into your system when you ran it the first time - I've seen it over and over.
Finally...speaking, again, strictly for the PC, there's plenty of free apps out there, so much so that honestly there's no reason to pirate other than to say "Ha ha, I got a free copy". GIMP is available for most Win platforms, and for the Mac, as well as Linux builds. There's a character limit to posts so I can't effectively list all of the free CD/DVD tools. And even if you don't want to screw with them Win7 (don't know about Vista) has a fine DVD toolkit built right in.