Add punctuation: RAR files are used to compress different files in a single file in archive format
A: RAR files are used to compress different files in a single file in archive format.

Add punctuation: Virus Attack Virus infection on the laptop hard drive results in file system corruption which in turn leads to data loss from the laptop drive
A: Virus Attack: Virus infection on the laptop hard drive results in file system corruption which in turn leads to data loss from the laptop drive

Add punctuation: THE BRIDGE has helped put Sweden and Denmark on the map and contributed to if not invented the term Nordic Noir
A:
THE BRIDGE has helped put Sweden and Denmark on the map and contributed to if not invented the term Nordic Noir.