Computer Literacy Lesson Three

1
Lesson 3
Computer Protection
Computer Literacy
BASICS: A
Comprehensive Guide
to IC3, 3rd Edition
Morrison / Wells

Lesson 3
Objectives
 Identify the importance of protecting computer
hardware from theft and damage.
 Explain how to protect data.
 Identify environmental factors that can cause
damage to computer hardware and media.
 Identify how to protect computer hardware from
power loss and fluctuation.
 Identify common problems associated with computer
hardware.
2 Morrison / Wells CLB: A Comp Guide to IC3 3E

Lesson 3
Vocabulary
 backup
 data theft
 driver
 encryption
 humidity
 ping
 power spikes
 surge suppressor
 uninterruptible
power supply (UPS)

Lesson 3
Introduction
 As the use of computers has grown in
volume and importance, protecting computer
systems and the information they hold has
become increasingly important.
 There are many issues of computer
maintenance, the risks of computing, and the
measures that can be taken to minimize
those risks.

Lesson 3
Protecting Computer Hardware
from Theft and Damage
 Theft of and damage to computer equipment
is a serious problem. Safeguards include:
– Physically secure equipment
– Use security locks
– Mark equipment with identification mark
– Insure the equipment
– Back up data to a separate system
 Employees using company computers for
personal use can be a type of theft.

Lesson 3
Data Protection
 Data is a critical component of businesses.
 The risk and severity of data theft is due to:
– The value of data stored on computers
– Confidential and private data being stored
– Increased use of laptops outside a secure network
– Increased proficiency of data hackers and thieves
 Encryption is a secure process for keeping
confidential information private.
Morrison / Wells CLB: A Comp Guide to IC3 3E
6

Lesson 3
Data Protection (continued)
 Data Backup:
 Because data is so valuable, you must back up
important files regularly.
 Backup procedures should place a priority on files
that would be difficult or impossible to replace or
reconstruct if they were lost.
 Have secure backup procedures that include a
regular schedule for backing up designated files and
storing the backup files off site.
7

Lesson 3
Environmental Conditions
 Computers require the right balance of physical
and environmental conditions to properly operate.
 Temperature:
 A temperature range of 68 to
75 degrees is optimal for
system reliability. A separate
thermostat can monitor
temperature and humidity
levels in a computer room.
8

Lesson 3
(continued)
 Humidity:
 A high level of humidity can cause computers
to short circuit, resulting in the loss of data
and damage to hardware.
 For optimal performance, the relative
humidity of the computer room should be
above 20 percent and below the dew point.
9

Lesson 3
(continued)
 Water Damage:
 If a computer suffers water damage, make
sure it is completely dried out before you
restore the power.
 Magnetic Fields and Static Electricity:
 A single spark from static electricity can
damage the internal electronics of a
computer. Have grounding protection.
10

Lesson 3
(continued)
 Maintaining Equipment:
 Cut down on computer repair through
preventive maintenance. Create a monthly
maintenance schedule and follow it regularly.
 Physical Damage:
 Prevent damage to portable computers due
to physical shock by transporting devices
with care, such as in padded cases.
11

Lesson 3
Power Loss and Power Fluctuation
Issues
 An unexpected power outage can wipe out
any data that has not been properly saved.
 Protect electronic devices from power spikes,
which are short, fast transfers of electrical
voltage, current, or energy.
 Surge suppressors can
protect against power
spikes.
Surge suppressor
12

Lesson 3
Power Loss and Power Fluctuation
Issues (continued)
 One option for preventing data loss due to
power outages is to install an uninterruptible
power supply (UPS).
 A UPS contains a
battery that
temporarily provides
power if the normal
current is interrupted.
13

Lesson 3
Hardware Issues
 You can resolve or prevent many hardware
issues by proper planning and training.
 Crashed Hard Drive:
 To evaluate the condition of the drive:
– Verify the cable is not damaged and is plugged in
– Use a boot disk to determine if drive is readable
– Use diagnostic and data recovery programs
– Use a data and recovery service
14

Lesson 3
Hardware Issues (continued)
 Damaged Media:
 Hard disks and other media eventually fail,
but often you can recover the data.
 First, move it to a secure environment, then
inspect or test it to evaluate the damage.
 The type of damage determines the type of
recovery method to use.
15

Lesson 3
 Printer Problems:
 Paper jams are one of
the more common
problems.
 Display Problems:
 The majority of display problems are caused
by incorrect, corrupted or missing video
drivers.
16

Lesson 3
 Inoperable Hardware Devices:
 Could be a software, electrical, or mechanical
problem.
 A small program called a driver instructs the
operating system on how to operate specific
hardware.
 Loss of Network or Internet Connectivity:
 Means people cannot communicate or work
effectively.
17

Lesson 3
Summary
In this lesson, you learned:
 Computer equipment needs to be protected
from theft and damage
 Back up data frequently and consistently to
avoid losing important information.
 The right balance of physical and
environmental conditions are required for
computers to operate properly.
18

Lesson 3
Summary (continued)
 High humidity, water, and electric/magnetic
fields can damage computer equipment.
 Preventive maintenance reduces equipment
repair needs.
 Electrical power failure can destroy data and
equipment.
 Surge suppressors can protect against
power spikes.
19

Lesson 3
Summary (continued)
 Computer centers are vulnerable to problems
such as a crashed hard disk, damaged
media, printer and display problems,
inoperable hardware devices, and loss of
network and Internet connectivity.
20

Computer Literacy Lesson Three

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Computer Literacy Lesson Three