question: did someone email you a ngr file and you're not sure how to open it? maybe you have found a ngr 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 ngr file related error message.
Capitalize this past sentence correctly.
A: Did someone email you a NGR file and you're not sure how to open it? Maybe you have found a NGR 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 NGR file related error message.

question: 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, scksp.dll may be mistakenly deleted.
Capitalize this past sentence correctly.
A: 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, scksp.dll may be mistakenly deleted.

question: 13) the next step is to determine the colour or pattern for your panels.
Capitalize this past sentence correctly.
A: 13) The next step is to determine the colour or pattern for your panels.