I’m planning to start fixing computers’ hardware and software problems. I’m not planning to make a company, just smt on my own. I’m not rich so I will not use originall software. Is that going to be illegal? I mean, i’ll not take money for the software, but for the favor.

10x in advance
What if i install downloaded OS and install trial versions software? Is that going to be illegal again?

10x again. I don’t want to mess up with the authorities…
Missed to mention – i will use the S/N from the box i’ll be required to fix.