question: there are quite a few different options to consider when looking at bags for your 17 inch laptops and notebooks.
Capitalize this past sentence correctly.
A: There are quite a few different options to consider when looking at bags for your 17 inch laptops and notebooks.

question: if your pc opens the h4c file, but it's the wrong application, you'll need to change your windows registry file association settings. in other words, windows is associating h4c file extensions with the wrong software program.
Capitalize this past sentence correctly.
A: If your PC opens the H4C file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating H4C file extensions with the wrong software program.

question: now you can color her and her brother.
Capitalize this past sentence correctly.
A: Now you can color her and her brother.