If you are referring to Word in particular, it happens because "Typing replaces selected text" is enabled. See the related link for a video on how to disable it.
If, on the other hand, you are asking how to disable it on the whole operating system, it's not possible and your typing in different programs depends on the program itself.
If you've deleted your Windows 8 program files by mistake, you can do a recovery and put it back to factory settings. Make sure you backup your files before doing so.
For windows XP get yourself a copy of diskternals. I have had some very good results in the past with this program.
The easiest way is to download and install that program again. If you want to re-install the program, inform us which program was that and what do you mean by "refresh".
Yes you can retrieve a program from the windows computer recycling bin by going into your recycling bin by double clicking the desktop icon. And then find the program you had put into the recycling bin, right click it and select "restore." This will restore the program from where you deleted it off.
Windows seven comes with its own photo management program. It's called Windows Photo Viewer. It's pretty basic, but does everything you need it to do, including slide shows.
If you did not save/finish/publish the Windows Movie Maker project before closing the program, the videos are irretrievable. If you have a 'Saved" project, the video should be in your Collections folder - unless you moved/changed/deleted the original source files on your computer.
In order to recover your deleted Firefox history, you will need to use the System Restore feature in your computer. This is a Windows program that periodically makes a snapshot of your computer. Once you choose a restore point, your history will return to your browser.
It is a program for capturing images from selected parts of the computer screen. It is a Windows program, which doesn't need to be installed and doesn't require any special system files. It contains five snapping modes and has multilingual versions. It can magnify selected parts of the screen.
Any program, folder or files not needed is deleted, and the hard drive defragged, once the Windows cleaner utility is used.
The details may vary, depending on what program you use.In Microsoft Word, the content of the selected cells will be deleted, but the empty cells remain. If you want to remove the entire row, there is a corresponding command in the right-click menu. Or you can use the "Cut" (Ctrl-X) shortcut - if you have nothing in the Clipboard which you need to save for later, since "Cut" will replace that.
It'll send it to something known as the 'Recycle Bin' where it is stored until you delete it permenantly off your computer. If it's deleted off a USB/external drive, then it's put into a cache, which is inaccessable by a regular user and requires a program to retrieve it.
The program used to store files on windows is called: Windows Explorer.