Please capitalize where necessary: the program uses a database in which indexed file contents are stored.
A: The program uses a database in which indexed file contents are stored.

Please capitalize where necessary: did someone email you a samples file and you're not sure how to open it? maybe you have found a samples file on your computer and wondering what it's for? windows might tell you that you can't open it, or in the worst case, you might encounter a samples file related error message.
A: Did someone email you a SAMPLES file and you're not sure how to open it? Maybe you have found a SAMPLES file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a SAMPLES file related error message.

Please capitalize where necessary: a local painter, not familiar only to a small extent with forms canonical orthodox iconography, conducted in a secular vision, a suggestive and interesting description of the three plastic “sectors” bible forming the hereafter: abraham's bosom, heaven and hell.
A: A local painter, not familiar only to a small extent with forms canonical Orthodox iconography, conducted in a secular vision, a suggestive and interesting description of the three plastic “sectors” Bible forming the Hereafter: Abraham's bosom, Heaven and Hell.

Please capitalize where necessary: 4:17in this love has been made perfect among us, that we may have boldness in the day of judgment, because as he is, even so are we in this world.
A:
4:17In this love has been made perfect among us, that we may have boldness in the day of judgment, because as he is, even so are we in this world.