Operating Systems and Computing Networks

1. WINDOWS TOOLS
These are the tools that are going to be explained:
 Keyboard properties
 Power battery
 Sound and video devices
 Hour
 Display
We start:
1. Click in control panel and then we choose the category that we want to
adjust (this step will be the same for each tool explication):

2.  KEYBOARD PROPERTIES
If we want to adjust the keyboard properties we have to click in Printers and other Hardware
and then in Keyboard:
Keyboard
Here we have the different options to adjust the keyboard:
 Speed:
Under Character repeat,
- Move the Repeat delay
slider to increase or
decrease how long you
must hold down a key
before the keyboard
character repeats.
- Move the Repeat rate slider
to make keyboard characters
repeat more slowly, or to
repeat more quickly.
- Move the Cursor blink rate
slider to increase or decrease
the cursor blink speed.

3.  Hardware:
 POWER BATTERY
If we want to adjust the power battery we have to click in Performance and Maintenance and
then in Power Options:
Power Options
In Hardware is the information of the
devices that are working and their
properties.

4. Here we have four different fields:
- Click the Power
schemes drop-down list
and select the power
scheme that most
closely matches how
you use your computer.
- Standby reduces power usage
when your computer is not in
use by turning off the parts of
your computer that use the
most energy. It only takes a few
seconds to start a computer
from standby.
- You can adjust the default behavior
of the power buttons on your
computer.

5. - Hibernation saves your programs
and shuts your computer down
completely. Hibernation uses no
power, but it takes a few seconds
longer to recover from
hibernation when you need to
use your computer again.
- UPS: Is an electrical apparatus
that provides emergency power
to a load when the input power
source fails.

6.  SOUND AND VIDEO DEVICES
If we want to adjust the sounds or the audio devices we have to click in Sounds, Speech, and
Audio Devices and then in Sounds and Audio Devices:
Sounds and Audio Devices
And we have different tabs:

7. If we click in advanced as part of speaker settings we have:
- Speakers and performance:
We continue with the different tabs:
Select the event
whose sound you
want to change.
Click the sound that you want to
associate with the event. If the
sound you want to use isn't listed,
click Browse to locate it.

8. Sound and
voice properties
changes.
Studies all the hardware devices that
have to be with sound and audio and
contains all their properties.

9.  HOUR
If we want to adjust the hour of our computer we have to click in Date, Time, Language, and
Regional Options and then in Date and Time:
Date and Time
Here we have three tabs:
Here we can select
the month, the year
and the day.
We can change the hour
using different formats.

10.  DISPLAY
If we want to adjust our screen background, the colours and the appearance we have to click in
Appearance and Themes and then in Display:
Adjust the hour according to
the time zone of the different
countries.
You also can
synchronise the time
with an Internet time
server.

11. There are five different tabs: To change the
theme, an example:
These are the
different
themes.
We can choose any
background and the
color.
We can also
choose the
position of the
background.

12. We can use a
screen saver.
And change
some settings.
Effects that we
can add to the
appearance.

13. COMPUTER NETWORK
 List of all necessary components for the network hardware
 Scheme of the equipment and devices connections.
 Network software settings and protocols. Screenshots
•Necessary components for the network hardware
What do we need to assemble and install a network composed by 7 computers
sharing an Internet connection and a printer?
7 Computers
Hub or switch
Network printer
Router
RJ45 connector cable
Ethernet cable
Network card(printer)

14.  SCHEME
The scheme would be like this:
Here we have 7 computers, a router, a printer and in the middle of those things and the
most important one, a switch (links network segments or network devices). It means
that in the switch are connected all, by the way that all of them can share the internet
connection given for the router and they also share the printer.
How can we do that?
Each computer is connected to the switch or hub using an RJ45 connector cable, in the
same way we connect the printer (which has a network card that is where we introduce
the cable) and the router. In the case of the router, it’s connected at the same time to
the telephone socket using an Ethernet cable to have internet connection for all the
computers.

15.  SCREENSHOTS
How to install these 7 computers?
 First click in MY COMPUTER and then in PROPERTIES:
 Click in COMPUTER NAME and CHANGE:
Each of the seven computers must have the same Workgroup and a different Computer name:
DIFFERENT
THE SAME

16.  When we have named each computer we have to connect them to the Internet connection so
click in CONTROL PANEL :
 Click in NETWORK AND INTERNET CONNECTIONS and then in NETWORK CONNECTION:
 Click in LOCAL AREA CONNECTION and in PROPERTIES:

17.  Then click in the INTERNET PROTOCOL and we find this:
 The IP address: Is unique and unrepeatable for each one of the computer, it means that each
computer MUST have a different one.
 Subnet mask: Specifies which bits of the IP address to specify a particular IP network or a host
within a subnet. Usado para “enmascarar” una porción de una dirección IP de modo que el
TCP/IP pueda determinar si cualquier dirección IP dada está en una red local o remota. Cada
equipo configurado con el TCP/IP debe tener una máscara de subred definida.
 Default Gateway: Is the code of the router that is giving the Internet to the seven computers, so
it has to be always the same.
The last thing, If we want to share a printer we
must click on it and share it:
Unique and
unrepeatable.
Normaly:
255.255.255.0
Router
code.

18. MSDOS COMMANDS
To insert the commands we have to follow these instructions:
 Click in START, RUN and type “cmd” ( commands)

19. I’m going to explain two commands:
 IPCONFIG:
Ipconfig is a command utility that can be used to display the network settings currently
assigned and given by a network. This command can be utilized to verify a network connection
as well as to verify your network settings.
We type after the “Administrator>” “ipconfig” and push in enter:
Here is all the information of my computer’s IP configuration.

20.  PING:
Helps in determining TCP/IP Networks IP address as well as determine issues with the
network and assists in resolving them. See the ping definition for a full description.
We type after the “Administrator>” “ping” and our IP address and click in enter:
All is correct. Let see if we put another IP address that is not ours:
It says that it couldn’t find it because it’s not correct.

21. SECURITY PROBLEMS
PROBLEM: I have a serious problem on my computer. When I open my browser
program it pops a message window which blocks the computer and claims the operating
system is locked due to the violation of some laws such as visiting pornography, child
pornography, and zoofila website among other fake claims, and then demands a fine of
100 Euro or $100 be paid by UKash or Paysafecard services.
Causes and prevention:
Police – Your operating system is locked due to violation of the laws of the UK is a fake
popup created by cyber criminals. When you are downloading programs from unknown
forums, visiting hacked websites or clicking on suspicious links, you easily get infected
with this virus. This originates from a family of screen lockers. Once installed, the virus
locks your computer and demands you to pay fine to unlock your computer. Usually, it
can completely lock your PC, causing you unable to access any of the saved files or
documents. It is extremely important to drop everything that you are doing and to
concentrate entirely on removing it from your machine.
Solution:
A safe and easy method is to download SPYWARE Doctor to automatically remove Police
– Your operating system is locked due to violation of the laws of the UK.
Manual Police – Your operating system is locked due to violation of the laws of the UK
Removal Steps:
* Stop the virus process using the windows task manager.
* Uninstall the virus program from windows control panel Add/Remove Programs.
* Open windows registry using regedit.exe command. Find and Remove all the virus
Registry Files.
* Search for the virus files on your computer and delete it.
Please, be informed that manual removal of the virus malware is a cumbersome
procedure and does not always ensure complete deletion of the virus, since some files
might be hidden or may automatically reanimate themselves later.
Another way is to download Police – Your operating system is locked due to violation of
the laws of the UK Removal Tool to automatically remove the virus.

22. PROBLEM: When I start my computer up I always find a blue star and a message
from Microsoft "Windows Genuine Advantage" to buy the Windows Original as long as
mine, like many users’, is not, or at least I do not remember having bought. Let me know
how I can delete the notice and how I can prevent myself from getting it again.
Causes and prevention:
Windows Genuine Advantage (WGA) notifications occur when your computer hasn't
passed the validation test. The validation test can be failed because you installed a
pirated non-genuine copy of XP, or because you have changed your XP product key to a
software-generated key, or sometimes it just happens for no reason at all. Here's how to
get rid of the annoying notifications.
Solution:
How to Stop Installation Wizard from installing Windows Genuine Advantage Notification?
1.When you see the window for installing the Genuine Advantage Notification software
click cancel.
2.Go to "My Computer.
3.Click on "Local Disk", usually it's C:.
4.Go to folder "Windows."
5.Go to folder "system32."
6.Look for the folder KB905474 and click it to see the files inside.
7.Verify that the folder contains files that have "WGA" or “Genuine Notifications" in the
filenames.
8.Delete the folder KB905474. This stops the Installation Wizard from installing
Windows Genuine Advantage Notification.
9.Empty the Recycle Bin just to make sure Windows doesn't retrieve the deleted folder.