QUESTION: Fix punctuation: Once everything is connected correctly We will open the file etcinittab in Raspberry and we will discuss the last line to disable the login via the UART port
ANS: Once everything is connected correctly, We will open the file /etc/inittab in Raspberry and we will discuss the last line; to disable the login via the UART port.

QUESTION: Fix punctuation: The design can be individually adapted in shape and color for the respective application area Extensive creative freedom is left to the user We turn these ideas into reality with your wishes and our longterm experience
ANS: The design can be individually adapted in shape and color for the respective application area. Extensive creative freedom is left to the user. We turn these ideas into reality with your wishes and our long-term experience.

QUESTION: Fix punctuation: The property is divided into 3 independent apartments each of around 100 square meters
ANS: The property: is divided into 3 independent apartments each of around 100 square meters.

QUESTION: Fix punctuation: Dvd_2chexe problems can be attributed to corrupt or missing files invalid registry entries associated with Dvd_2chexe or a virus malware infection
ANS:
Dvd_2ch.exe problems can be attributed to corrupt or missing files, invalid registry entries associated with Dvd_2ch.exe, or a virus / malware infection.