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There are tons of Screensavers that can be download for free on the Internet, and nearly all of these can be installed easily. These are usually categorized and related to themes. Nature lovers can pick picturesque locations. Fish lovers can pick out from other kinds of aquariums with multi-colored fish that are lapping through colored water. Those who actually like adventure sports or aircraft can select from a wide array of animated images and clips of death-defying stunts. Screensavers can as well be slide displays from different photographs of movie celebrities, sportspersons and politicians.

Yet, several precautions need to be taken before downloading Screensavers. The most fundamental one is that Screensavers must be downloaded from trusted web sites. It’s also always a good idea to scan Screensavers for computer viruses and some other potentially dangerous elements, like spyware and adware. If an anti-virus is already installed on the computer, a right click enables a menu which provides for a ‘scan with…’ option. The option can be chosen and left-clicked to check the picked out download before double-clicking it and performing installation.

Sometimes Screensavers are extremely graphic-intensive. This means that they contain so many computer graphics that are huge files. Tremendous files need lots of space on the computer when they run, and affect the computer performance. Your computer might operate so much harder and so much faster than regular, this can cause the computer freezes. Then the computer needs to be reboot and all the unsaved data on the computer such as open files that were being worked on before the Screensaver was activated will be lost.

Numerous Screensavers also make the hard drive of the computer collapse, causing unretrievable data. So, it is essential for users to download Screensavers that are compatible with the configuration of their computers. This means that the speed of the CPU in the computer, and the available space on it, should be sufficient for the Screensaver to be downloaded, installed and operated.

Many users like to create their own Screensavers, frequently with the visuals and audio of their choice. Several software applications facilitate this. Out of these, several can be freely downloaded from the Internet. Nevertheless, these should be downloaded just from trusted websites, and should be supported by the configuration of the user’s computer. Once downloaded, these should also need to be scan for viruses and other common infections. When installed, these programs enable the user to combine pictures, video clips and audio clips to create a personalized Screensaver, sometimes even for circulation amongst best friends and family.

Adware is similar to Spyware, a malicious software/programs installed into your computer without prior notice.
It happens when you install a software contains an adware, downloaded some files such as free games, free software, free music, ringtone, videos and more. An adware can also installed into your computer together with a free software that you previously installed.

These malware is rapidly growing and infecting many computers from around the world.
Compared to a spyware, an adware is harmless. It only generates popup banners and advertisements on your computer.
Although it is harmless, but for some people it is annoying.

How to prevent an adware ?
Avoid downloading softwares from untrusted sites, avoid downloading games, videos, musics from an untrusted vendors.
Read the user agreement when installing software, particularly a free software.

Cleaning up your computer from an adware.
First, you need to have an anti-adware programs. You may download from many trusted vendors such as AVG Technolgoies, Kaspersky, Symantec, and many more.
Second, install the software by following the installation wizard. Third, perform a complete scan on your computer.

After all the steps above completed, you need to recheck the security level on your computer. It should at least set into medium level to protect your computer from unwanted downloads.

Spyware is a malicious software or some people call it malware that placed into your computer without you even realize of its existence. You would probably wondering how can it get inside your computer.
Well, this can be happen when you visit an online game site or a website that offers a free softwares, videos or musics. When you’re done downloading, the spyware also gets downloaded into your computer.

These days, spyware have infected millions of home computers. Spyware is tracking your online habits. What sites are you visiting, what products are you searching through the internet. Some spyware also capable of logging the keystrokes that you have made, every bit of information you enter to fill out a form, for example your name, address, credit card information. Then, the information collected by this spyware is sold for a business purpose, or even worst it can lead to an identity theft. Another problem with a spyware inside your computer is that it slows down the performance of your computer.

To remove a malicious software you need to have an anti-spyware prorams, many trusted vendors provided this programs free of charge, such as AVG Technologies with their AVG Free Edition, Spybot – Search and Destroy, and many more.
You can simply download the programs, install it on your computer. After all the installation steps completed, then you may proceed to scan your computer. You may need to double scan your computer using a different anti-spyware program just to make sure that your computer is clean.
Once the scanning progress completed, you should reboot your computer, and perform scanning once more, just to make sure there are no “ticklers”. Ticklers is a mini program that can reinstall a deleted file.

The best way to prevent spyware is to download only from a trusted vendors, avoid opening an unsolicited email, when downloading software read the agreement carefully.
Sometimes when you download a free software the agreement will state that they are also installing a software that acts just like a spyware, this way you will have the full control whether to allow or deny such software to operates in your computer.