uninstallation: as dll files are created to support other programs and softwares working well, the data and functions are actually shared by many programs. when you uninstall a program, pots.dll may be mistakenly deleted.

How would the previous sentence be correctly capitalized?
Answer: Uninstallation: As DLL files are created to support other programs and softwares working well, the data and functions are actually shared by many programs. when you uninstall a program, pots.dll may be mistakenly deleted.
having arrived at the yop you turn right twice and you are there.

How would the previous sentence be correctly capitalized?
Answer: Having arrived at the yop you turn right twice and you are there.
did someone email you a kim file and you're not sure how to open it? maybe you have found a kim 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 kim file related error message.

How would the previous sentence be correctly capitalized?
Answer: Did someone email you a KIM file and you're not sure how to open it? Maybe you have found a KIM 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 KIM file related error message.
establish a contact phone for next of kin.

How would the previous sentence be correctly capitalized?
Answer: Establish a contact phone for next of kin.