[21]

You can do whatever you want on Windows if you know your way. You can disable the system integrity checker if you are admin.

You are wrong regarding the right to modify software. It seems to say pretty clearly that you are only allowed to modify software only to make it work as intended:

Exclusive rights of the rights-holder: the translation, adaptation, arrangement and any other alteration of the program;

Limitations of those exclusive rights: A lawful acquirer of a program may reproduce, translate, adapt, arrange or alter the program, when it is necessary in order to use the program in accordance with its intended purpose.

http://eur-lex.europa.eu/legal-content/EN/TXT/?uri=URISERV%3...

[kuschku]

> You are wrong regarding the right to modify software. It seems to say pretty clearly that you are only allowed to modify software only to make it work as intended:

That’s your interpretation of the law, the ECJ has ruled otherwise.

[21]

Please link to said ruling. The one I could find was related to the right to sell an unmodified backup copy.