|There is a way to do that but you wouldn't like it. It is called a system repair. That would put Windows back to the original state. You would then need to re-install all the software and service packs. That is more work than your other alternative.|
According to the link I provided above there are ONLY 29 default fonts. If you copy and paste all the existing fonts to a different folder (you never know when you may need them) and then you can highlight just the 29 fonts and use "invert selection to highlight all the remaining fonts. Then hit delete. Viola, all gone except for the 29 needed.
In case you don't know how to selectivly high light files you click on them while holding down the shift key or the control key. Control will allow random selection, Shift is for many in order.
After the list of 29 is highlighted go up to Edit and use invert selection to high light all BUT the 29.