how can malware, virus etc harm our PCs

August 29, 2011 at 11:07:18
Specs: Windows XP
how malware,virus and spyware etc are harmful to our pc when downloading any from internet?

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August 29, 2011 at 15:09:26
Usually doesn't harm pc it damages data.

1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.

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August 31, 2011 at 10:10:14
maiyam, there're a few (thankfully a very few) that actually are designed to harm the machine itself (physical harm). A few cause the HDD head to bang into the disk damaging it, etc.
Most, as Jefro said, damage data. Still others make the machine 'seek' a specific addy over and over causing a significant slowdown and considerable aggravation, making a machine which normally flies, drag it's feet in thick mud. In general, they're a no-no and need to be eradicated. I have an AV running all the time and scan mine weekly for nasties.
Ed in Texas

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August 31, 2011 at 15:34:31
In fact, malware these days is almost entirely financially motivated (with a few political agendas thrown into the mix, for good measure).

Malware authors have moved away from the "I wrote this because I can, give me props" to organised gangs with sophisticated hierarchies, literally in the business of spreading malware, distributing spam and general botnet activities (DDoS, BruteForcing etc).

Ask yourself, what money is there in actually damaging a machine? The idea of malware is to (attempt to) stay silent on your machine, and cash in on your blissful ignorance of their existance.
With the exception of true viruses (parasitic infectors, which can irreparably corrupt PE files) and Ransomware (encrypting data and demanding payment for the decryption key), most malware these days won't actually touch data per sé.

I hope this helps, any more questions, please feel free to private message me.

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