Add spaces: CrashofOS,operationslikeinstallation,reinstallationandupgradationwouldcauselossofentirefilesfromharddiskincludingyourPSDfiles

Answer: Crash of OS, operations like installation, reinstallation and up gradation would cause loss of entire files from hard disk including your PSD files

Add spaces: SettinguptheprinterusingaMacintoshcomputer

Answer: Setting up the printer using a Macintosh computer

Add spaces: Whilethere,herlegstartedtohurt,soshewenttoseeadoctor.

Answer:
While there, her leg started to hurt, so she went to see a doctor.