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Chapter 1.  Installing and Booting Windo... > Avoid reinstalling applications for ...

1.7. Avoid reinstalling applications for a dual-boot system

If you create a dual-boot system with Windows 2000 and your previous OS (Windows 9x or Windows NT), you'll probably want to run at least some of the same applications under both operating systems. Many applications that don't use the registry to store their settings (not too common these days) can run without reinstalling—you simply create shortcuts in Windows 2000 to their existing locations. If an application does use the registry or requires some of its files (such as DLLs) to be located in the systemroot\System or systemroot\System32 folder, you'll probably have to reinstall the application to be able to use it under Windows 2000 as well as your other OS. However, you probably won't have to duplicate the files by installing the application to a new folder. In most cases you can simply reinstall the application to its current location. Finally, some applications will recreate their registry keys to "heal" themselves automatically if the registry keys are missing. You can try running the application after installing Windows 2000 to see if it behaves this way.

Make sure to back up customized files such as templates prior to reinstalling the application. In most cases, reinstalling an application to the same folder overwrites any customized settings from the previous installation. Make sure you know which files you'll need to restore afterwards. Also, be aware that some customization settings are probably stored in the registry, so these might be lost when you reinstall.



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