Is it obligatory to inquire about the legality of the software used at work, and is it obligatory to leave the job if it turns out to be illegal, taking into account the widespread use of such software and the difficulty of finding a job that uses original software, and is it preferable to look for a job that has no relation to computers?

It is not permissible to copy software without the permission of its owners, and therefore it is not permissible to work in a field that involves the use of unlicensed software. If the work necessitates the use of unlicensed copies, then it must be abandoned, except in cases of necessity, while searching for permissible work. It is not necessary to completely abandon the field of computing, but only that which is prohibited. There is no need to inquire about software licenses unless it is known or highly probable that they are unlicensed, in which case their use is not permissible.