System Restore in Windows
By James Madison
System Restore is a component of Microsoft’s Windows Me, Windows XP, Windows Vista and Windows 7 operating systems that allows for the rolling back of system files, registry keys, and installed programs, etc., to a previous state in the event of malfunctioning or failure. In System Restore, the user may create a new restore point manually, roll back to an existing restore point, or change the System Restore configuration. Moreover, the restore itself can be undone. Old restore points are discarded in order to keep the volume’s usage within the specified amount. For many users, this can provide restore points covering the past several weeks. Users concerned with performance or space usage may also opt to disable System Restore entirely. Files stored on volumes not monitored by System Restore are never backed up or restored so for data recovery this is not an ideal solution. For this type of tech support, one can get in touch with a help desk specialist. System Restore backs up system files of certain extensions (.exe, .dll, etc.) and saves them for later recovery and use. It also backs up the registry and most drivers. System Restore points are also created automatically when software is installed using the Windows Installer, Package Installer or other installers which are aware of System Restore.
Sometimes, When Windows Update installs new updates to Windows then also Restore Points are created or when the user installs a driver that is not digitally signed by Windows Hardware Quality Labs. Every 24 hours of computer use (10 hours in Windows Me), or every 24 hours of calendar time, whichever happens first. This setting is configurable through the registry or using the deployment tools. Such a restore point is known as a system checkpoint. System Restore requires Task Scheduler to create system checkpoints. Moreover, system checkpoints are only created if the system is idle for a certain amount of time. When the operating system starts after being off for more than 24 hours or when the user requests it. On Windows Vista, shadow copies created during File Backup and Complete PC Backup can also be used as restore points. Older restore points are deleted as per the configured space constraint on a First In, First Out basis. In order to perform a system restore you need to:
Click start
Click my computer
Right click properties
A pop up opens up
Click system restore tab
Click to select the Turn off/on System Restore check box.
Or click to select the Turn off/on System Restore on all drives check box.
Click ok.
You will receive another pop up; click yes.
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System Restore backs up important system files of certain extensions and use for later recovery and use. If you find any difficulties regarding System Store, you can opt for technical support from a help desk specialist.
How Does a Wi-Fi Connection Work?
By James Madison
What comes to your mind when your listen the word Wi-Fi. In layman words it is nothing but a wireless connection that can be accessed without wires and cables. We all have accessed Wi-Fi connection but are unaware of it. This might be in airports or hotel rooms as these places are Wi-Fi enabled. The Wi-Fi technology has truly unplugged the world and the use of internet in our lives.
Gone is the Stone Age when computers were connected to routers and modems for internet connectivity. Today is the age of Wi-Fi connection as you can access internet anywhere and everywhere. Let us take a look at Wi-Fi technology with the help of computer support professionals.
Understanding the Concept of Wi-Fi
Wi-Fi is the abbreviated form of Wireless Fidelity. It is trademark name of standard wireless networking technology. It enables wireless access to the internet with the help of radio active connectivity. This technology is defined by IEEE 802.11 standard and has been designed to create uniformity in wireless networking products around the globe. In other words Wi-Fi is synonymous with wireless technology which is possible through advanced radio active communication techniques.
Now let us understand the components of Wi-Fi network. The most important component of Wi-Fi network is the wireless router. It is sort of connecting link between your laptop connected through a wireless network and internet. The transmitter as well as the radio signal converts digital signal to analog and analog signal back to digital. The speed of the data transmission on the network as well as the network security is dependant on wireless router. The next important component is the wireless adapter that is fitted in your laptop. This helps to receive and transmit wireless signals to the wireless router. Most of the wireless routers are fitted with Wi-Fi antennal boosters to increase the range of the signal.
How does Wi-Fi Work?
Now let us know how to Wi-Fi work? If you understand the concept of how radio signals work then understanding Wi-Fi signal is comparatively simple. Take for instance that you are in Wi-Fi enabled home and you want to access the internet through your laptop. At this situation the wireless adapter searches for signal. Once you switch on your laptop the attached or wireless adapter is operational. It searches for network source in your vicinity. The wireless adapter acts as transmitter as well receiver of radio signal. This also carries out the function of modem that coverts digital signals into analog and radio signals back to digital. Once the adapter gets signal through wireless router through radio waves, your PC gets registered with the wireless network for communication. The wireless router is connected to the ISP or Internet Service Provider with the help of an Ethernet port. The wireless router is the gateway for data transmission. The routers have the capacity to communicate over 2-4 GHz and 5 GHz radio frequencies. Therefore the higher frequency is the bandwidth for data transmission.
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