Please capitalize where necessary: if you know the name of wrong dll like dvdplay.exe, choose free download--saving money.
A: If you know the name of wrong DLL like dvdplay.exe, choose Free download--saving money.

Please capitalize where necessary: they were successful and the roman empire was extended to the upper reaches of the danube river.
A: They were successful and the Roman empire was extended to the upper reaches of the Danube River.

Please capitalize where necessary: virus infections: this is one of the major reasons that lead to corruption of the zip files. gaining access through internet or sharing files from drive, which is already infected with viruses can damage the file system storage drive.
A: Virus Infections: This is one of the major reasons that lead to corruption of the Zip files. Gaining access through internet or sharing files from drive, which is already infected with viruses can damage the file system storage drive.

Please capitalize where necessary: this image belongs to the following categories: badminton, individual sports, racquet sports.
A:
This image belongs to the following categories: Badminton, Individual sports, Racquet sports.