This document provides a checklist of preventative maintenance tasks to perform on a PC on a daily, weekly, monthly, yearly, and as-needed basis. It recommends daily tasks like running anti-malware scans and emptying the recycle bin. Weekly tasks include using disk cleanup utilities and updating anti-virus software. Monthly tasks involve disk defragmenting, backing up and restoring files, and cleaning hardware. Yearly tasks cover cleaning interior components and checking power supplies. It also lists tasks to perform after any hardware or software changes are made.