Please capitalize where necessary: step 2: after launching the software, a new window appears where you have to upload erroneous mov files by clicking on "open" option.
A: Step 2: After launching the software, a new window appears where you have to upload erroneous MOV files by clicking on "Open" option.

Please capitalize where necessary: be wary of pop-up windows that ask you to download software or that offer to fix your computer.
A: Be wary of pop-up windows that ask you to download software or that offer to fix your computer.

Please capitalize where necessary: so, this is going to be the catchall for links to spanish language television networks with online video content, online video sites, anything with spanish language content in video form. (that can’t be pigeonholed as a dvd or news.)
A: So, this is going to be the catchall for links to Spanish language television networks with online video content, online video sites, anything with Spanish language content in video form. (That can’t be pigeonholed as a DVD or news.)

Please capitalize where necessary: possibility of comparing new and old products
A:
Possibility of comparing new and old products