PC maintenance involves activities to keep computers running properly such as cleaning, backups, disk maintenance, and software updates. It includes preventive maintenance to avoid problems and corrective maintenance to fix existing issues. Regular maintenance saves money and time by preventing problems and safeguarding data. Common maintenance tasks include cleaning interior and exterior components, backing up important files, disk maintenance like defragmenting, and updating software and virus definitions.

1. PC Maintenance
PC Repair and Troubleshooting

2. Maintenance
• Maintenance - activities done to conserve the
original condition of an asset or resource
while compensating for normal wear and tear
• Computer maintenance - practice of keeping
computers in a good state of repair.
– Corrective Maintenance - performed to correct an
already existing problem
– Preventive Maintenance - performed to avoid
problems from occurring

3. Preventive Maintenance
• Importance:
– Saves money – maintain rather than repair
– Saves time – prevent rather than troubleshoot
– Safeguard your data
– Improves performance
• When to perform:
– The frequency of the maintenance will depend on
how often the computer is used and what is it
used .

4. Computer Maintenance
• Computer Cleaning - practice of physically
cleaning the interior, and exterior, of a computer
by removing dust and debris
• Back Up - Important data stored on computers
may be copied and archived securely so that, in
the event, of failure, the data and systems may be
reconstructed
• Disk Maintenance - Disk storage, such as your
hard drive, fills up with unwanted files over time.
Files may become fragmented and slows the
computer down

5. Computer Maintenance
• Registry - Operating systems files such as the
Windows registry may require maintenance.
• Computer security - protection of information
and property from theft, corruption, or natural
disaster, while allowing the information and
property to remain accessible and productive to
its intended users.
• Updates - Software packages and operating
systems may require regular updates to correct
software bugs and address security weaknesses

6. Maintenance Checklist
Activity Frequency Auto?
Scan hard disk file systems for errors Daily Yes
Scan for viruses Daily Yes
Back up data Daily No
Clean monitor screen Weekly No
Defragment hard disks Weekly Yes
Scan for hard disk read errors Weekly Yes
Clean mouse and keyboard Monthly No
Check for full hard disk volumes and remove Monthly No
unnecessary files
Monthly Someti
Update virus definition files
mes
Check power protection devices to ensure they are Quarterly No
still protecting the system

7. Maintenance Checklist
Activity Frequency Auto?
Check power supply fan for ventilation and dirt Quarterly No
build-up and clean if necessary
Back up CMOS information Quarterly No
Check processor temperature, inspect heat sink Annually or Whenever No
and fan to ensure they are working case is open
Annually (or whenever No
Check hard disk for temperature and vibration
case is opened)
Clean exterior of case Annually No
Clean exterior of monitor Annually No
Check and clean interior, motherboard and Annually No
expansion cards if necessary
Check internal connections and cables Annually No

8. Computer Virus
• Run without the user wanting it to and/or
create effects that the programmer wants but
that the user did not want or request
• Have the ability to "infect" or modify other
files or disk structures
• Replicate itself so it can spread to other files
or systems.

9. Types of Virus
• Boot Sector Infectors - attacks the boot program
and is executed by the system when the PC starts
up
• File Infectors - attack and modify program files by
loading itself into memory and waits for a trigger
to find and infect other program files
• Macro Virus – these programs use the built-in
programming languages and when opened they
duplicate themselves into other documents and
spread

10. Virus Prevention
• PC
– Connections is equal to risk
– Software Installation
– Use Backups
– Control Access
• Networks
– Control your connection
– Scan shared files

11. • Removable Media
– Scan before use
– Remove before Reboot
– Disable Booting from Removable Media
– Boot Password
– Abstinence

12. • Internet
– Obtain software from reputable sources
– Scan new downloaded files
– Beware of automatic downloads

13. Backup
• Risk to your data
– Hardware Failure
– Software Failure
– File System Corruption
– Accidental Deletion
– Virus Infection
– Theft
– Sabotage
– Natural Disaster