How Does a Virus Infect Your Computer?

Virus Infect Your Computer

Though they're not a living thing like you and me, computers can get "sick" from viruses, too.

A computer virus is a software program designed to replicate itself and spread to other machines. In most cases, the program is "malicious," meaning its purpose is to cause the computer malfunction in some way.

In general usage, the term "computer virus" includes all forms of "malware," or malicious software.

Instead of sniffles and a fever, some common symptoms of a computer viral infection are slow performance, data loss and system crashes, all of which can make people using the machine feel ill as well.

Why Do Computers Crash?

Why Do Computers Crash?

 

It turns out that humans are to blame for computer crashes. These involuntary shutdowns typically result from glitches in software – code written by human programmers.

“This code can contain many, many bugs, and these bugs can manifest themselves every now and then to cause program crashes,” said Junfeng Yang, professor of computer science at Columbia University.

Software such as Microsoft Word contains code that gives the computer a set of instructions to, say, store data in a certain place. But if one of the memory cells is corrupt (for example, contains a scratch), and the computer doesn’t know what to do, it freezes up or crashes.

How Do Calculators Calculate?

How Do Calculators Calculate?

Electric currents, transistors and logic gates work together to put two and two together inside a calculator. Credit: sxc.hu

When you and I calculate two plus two, we imagine a number line, start at two and hop over a couple of spots to get to four (or at least we did until we memorized the answer). Simple — so simple, in fact, that "putting two and two together" is an analogy for deducing something obvious.

But what if you can't imagine a number line? What if you're a little, gray, button-covered box full of electrons? How, then, do you calculate that two plus two equals four?

The process itself is not so simple, but once you understand how this basic arithmetic operation works in a calculator, you can "put two and two together" as to how it performs much more complicated calculations.

10 guidelines to make your Laptop work efficiently

Guidelines to make your Laptop work efficiently

 

People can use their laptop for their work as well as entertainment. So, it is essential to maintain and cleanup your laptop periodically for it to work like a new one. Here we present some tips and guidelines to make your laptop work efficiently.

Here are some guidelines for it.

1. Defragment periodically – once every week. The files are split up and stored in several locations on a computer memory. When you defragment, the pieces of files are grouped to a particular place, making it easy to access.

10 Tech Myths Busted

Tech Myths Busted

Top 10 Best Laptops To Buy in 2011

Those people who have to buy laptop this year, we have this perfect post for you about the top 10 best laptops to buy in the year 2011. This era is the era of technology; you will find it really difficult to search for a perfect notebook for you. Your budget and required specs can have so many laptops under it that you will find it very difficult to do a proper Laptop hunt.