QUES: that affect humans even men or women and this can be painful

correct the punctuation.

CORRECTED: that affect humans , even men or women and this can be painful

QUES: If the firm does not meet the customers demand rapidly and completely it may loose him to a competitor who is able to do so

correct the punctuation.

CORRECTED: If the firm does not meet the customer's demand rapidly and completely, it may loose him to a competitor who is able to do so.

QUES: At the top click Security

correct the punctuation.

CORRECTED:
At the top, click Security.