Precautions that must be taken in order to secure computer files

Control Access to Your Machine: Don’t leave your computer in an unsecured area, or
unattended and logged on, especially in public places.

Use Email and the Internet Safely: Ignore unsolicited emails, and be wary of
attachments, links and forms in emails that come from people you don’t know.
Avoid untrustworthy (often free) downloads from freeware or shareware sites.
Install Protective Software: When installed, the software should be set to scan
your files and update your virus definitions on a regular basis.
Choose Strong Passwords: Choose strong

with letters, numbers, and special characters to create a mental image or an
acronym that is easy for you to remember. Create a different password for each
important account, and change passwords regularly.
your wireless network:
If you use a wireless, be sure to take precautions
to secure it against hackers. Encrypting wireless communications is the first
step. Choose a wireless router with an encryption feature and turn it on.
A firewall helps to
prevent data from entering or leaving your computer without your permission. It
helps make you invisible on the Internet and blocks communications from
unauthorized sources.
There are two types of firewalls—software and
Updated Anti-virus Programs: 
software helps to protect your computer from viruses that can destroy your
data, slow your computer’s performance, or cause your computer to crash.
Anti-virus software scans your computer for patterns that may indicate an
infection. The patterns it looks for are based on the signatures, or
definitions, of known viruses.
Back up all your Data:
There are many hardware and software alternatives for backing up your data
including USB flash drives and external hard drives (hardware) as well as
archiving and disk imaging programs (software).
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