I found this info On the net for Screan savers:
SCR-files
If the downloaded file is of 'scr' type, you need to move it manually to c:\windows unless author's instructions tell you otherwise (sometimes needs to go to c:\windows\system or c:\windows\system32).
*Go to 'my computer', open c:\, then 'windows', then 'system32', and finally 'en-US'.
Alternatively you could just type C:\Windows\System32\en-US in your explorer window
To add a new screensaver, move the '.scr' programme to the 'en-US' file and then change the file from '.scr' to '.scr.mui'. Just tried it with the matrix one, and it worked fine (Windows 7). Alternately, in windows 7, you can right-click on the .scr file and click "Install" and it will install it for you.
You can find the locations of Windows screensavers by navigating to the "C:WindowsSystem32" folder on your computer. This is where the screensaver files are typically stored.
Lavender.
Screensavers pre-installed with Windows can be removed as they are not essential to the proper functioning of Windows. It may be necessary, however, to change user permissions in order to subsequently delete the files.
www.screensaver.com/ has lots of screensavers of great variety. Simply access the site and you will see the large area of different screensavers. Simply click, and save.
To remove stored screensavers from your drive, navigate to the folder where screensavers are stored, typically found in C:\Windows\System32 on Windows. Look for files with the .scr extension, which are screensaver files. Simply delete any screensaver files you no longer want. Remember to empty the Recycle Bin afterward to permanently remove them from your system.
Type regedit into the search bar under the Start menu. Open the program that comes up, and you see a list of folders. Screensavers will be found under: Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Screensavers.
To get more screensavers on Windows 7, you can download third-party screensaver applications from reputable websites. Once downloaded, install the screensaver by following the provided instructions, which typically involve running an installer or copying files to the appropriate directory (usually C:\Windows\System32). After installation, right-click on the desktop, select "Personalize," then click on "Screen Saver" to choose from the newly added screensavers. Be sure to scan downloaded files for viruses to ensure your system's safety.
There are many websites that offer cool screensavers with animals. These sites can be free, or a small fee is required so a large screensaver pack. Another option is you use the photos you have and use the features on windows to have a slideshow.
Well, honey, back in my day, screensavers were all the rage. You can find free screensavers by searching online on websites like Screensavers Planet, 1001 Free Downloads, or even good old Google. Just make sure you're not downloading any sneaky viruses along with those pretty screensavers, alright?
One can download screensavers at Fun Utilities, Cat Licking Screensaver, Popular Screensavers, Filter Ratings, Screensavers, Tucows, Downloads Yahoo and many more.
There are many online shops that sell screensavers. Amazon.com is one of online shop that sells screensavers pack and you can get 3 screensavers for free download. You can visit www.amazon.com
Even in other Windows Operating System,there is no provision for removing/deleting unwanted screensavers. Am using Windows XP Home Edition,Version 5.1 SP2