Add punctuation: We chose Teknos as our partner because we knew that Teknos has the best paints
A: We chose Teknos as our partner because we knew that Teknos has the best paints.

Add punctuation: The fastest and easiest way to open your DX file is to doubleclick it
A: The fastest and easiest way to open your $DX file is to double-click it.

Add punctuation: Windows 10 version 1703 25 vulnerabilities of which 2 are rated critical 23 important
A:
Windows 10 version 1703: 25 vulnerabilities of which 2 are rated critical, 23 important