Kips IT Class 10 Chapter 10 Solutions Care and Maintenance of a Computer Part-A

signs of a virus attack on your computer:
• Reduce the speed of a computer by decreasing the memory.
• Cause strange movements or patterns on the screen.
• Display unusual messages like “Your PC is stoned”, etc.
• Increase the use of disk space and growth in file size as the virus attaches itself to many files.
• Frequent hanging of the system.
• Shows abnormal write protect error.
• Display a change in data against the filename in the directory, when a virus modifies the file.
• Reformat the hard disk.
• Delete or damage the files.

Security programs: Installing reliable anti-virus software is a must. The antivirus should be regularly updated. It should also be programmed to regularly scan and quarantine the system.
Installation of firewalls: Restricting access to unwanted sites through appropriate settings in the browsers should also be done as a mandatory act.
Secure internet access: Be vigilant when accessing or uploading information on the Internet. Only secure sites should be used for financial transactions and no personal information should be shared or saved (even accidentally) on any website. Installation and download from un-authorised sources should be avoided.
Regular security updates: Keep your applications and operating system updated at all times.
Avoid spams: Mails from un-wanted and un-warranted sources should be deleted without reading or downloading. Any attachments in such mails should never be downloaded or installed onto the system.
Backups: Taking backups regularly is a good practice. This not only protects us against data loss but also helps to restore the integrity of the data. Make sure that the data is encrypted by using encryption software to protect from unauthorised access.
Scanning all portable devices: Scan all portable storage devices, such as pen drive etc., before use as these are the most common sources of infection in computers.
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Antivirus software are computer programs, which are designed to identify, prevent, and remove viruses from a computer. They perform the following tasks in a computer:
• Scan the computer files to look for known viruses, matching definitions from the virus dictionary
• Identify suspicious behaviour from any computer program that might indicate infection

Some antivirus softwares are Norton Antivirus, McAfee Virus Scan, AVG Antivirus, Quick Heal Antivirus, Avira Antivirus.

Computer maintenance refers to the practice of keeping computers in good condition so that they can work efficiently. The maintenance of computers can be classified into two categories – Hardware maintenance and Software Maintenance.

• identify, prevent, and remove viruses from a computer
• Scan the computer files to look for known viruses, matching definitions from the virus dictionary
• Identify suspicious behaviour from any computer program that might indicate infection