Can you be a bit more clear?
Are you saying you installed 5000 ttf files in your c:\windows\fonts directory?
If so, that's WAY TOO MANY. Windows will drown and crawl and really play up with just a 2-300 hundred fonts. It's not meant to work like that. You should use a sensible font maintenance package, like, for instance "Printer's apprentice" (shareware). This will load fonts as required, allow setting-up of groups of fonts and so forth.
If you have simply used the control panel/fonts applet, whatever fonts you have added should be available. Then using a suitable word-processor, you need to select the font you wish to use for specific text.