Computer Basic Information
The essential difference between an operating system like Linux and one like Windows is that

there are multiple versions of Linux, but only one version of Windows.
Linux is proprietary, whereas Windows is not.
any programmer can modify Linux code, which is not permitted with Windows.
None of these
Windows can run with an Intel processor, whereas Linux cannot.

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Computer Basic Information
VIRUS stands for

Vital Information Recourse Under siege
Virus Information Resourse Under siege
Vital Information Recourse Under System
Vital Information Reason Under siege

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