If you have TONS of fonts installed your boot time may be suffering from it.... You can easily end up with a ton of fonts without even realizing it!

1. Click start --> Settings --> Control Panel
2. Click Fonts

You'll see a list similar to this one:

 

Find some fonts that you'd like to delete and select them. Then right click and hit delete.

You'll be asked to confirm this with a box like this:

The other way is to move these fonts to a different directory that way you can easily put them back in when you wish to use them again.