Hi

There are two reasons for corruptions appearing:

any disruption in the data flow between your computer and the downloading host(s) can lose sections of the data or change the bits so that a corruption is declared during internal verification;
some thoughtful and caring people leave corrupted files in their Shared areas.

There is nothing wrong with your computer. Just make sure that you don't leave these files in your Shared area without a clear warning attached up-front. Better still, remove them from your Shared area altogether.

There are some files to avoid. For example, amend your filters to exclude hits with !!! or / in the results.

There is nothing to worry about in the err.txt and out.txt appearing after installation.