First of all you should be careful when you use a screensaver on a LCD. A pixel it's on when it's dark on a LCD. So if a screen gets black on a LCD like some screensavers do it can be damaged.
After all this problems there were invented CTR's more resistant to burn-in or with sleep mode. Sleep mode means that the monitor comes in to a state like "turned off". But also there were invented many other solutions like games that when not being played change the screen time to time or screensavers.
When screensavrs were invented they were very simple. They just blanked you screen setting it to full black. After that there where inserted many effects including sound and animations to make the screensavers more entertainment.
And now we live in an Internet world full of screensavers of all types. You can find screensavers on any theme. If you like it you can just download it.
One of the best things at screensavers it's that you can usually find screensavers for free and you just need to install them. Then they will be launched automatically.
You should be very careful when you are using any burning devices. The problem is that screensavers are launching by their selves and can create great things on your display but they also use a lot of your CPU. So if the CD is burning an the screensaver is launched meanwhile, you risk to have an improperly burned CD.
When you install a screensaver it will be copied in the system directory. So it's easy to use them because once there are installed windows will fin them and it will add them to a list of available scrensavers. You can see this list on the display properties dialog.
Every screensaver has a lot of settings that allow you to change it. You can change this settings only trough windows.
So the inventing of the screensavers it's a very good thing for our "baby-computers". They can't harm it and all they do is keeping you monitor safe, so you shouldn't hesitate to use them.
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