Welcome to 7 forum cinnamoninn95...

1 simple way is to get Picasa 3.5 & then you can view the RAW format because its supports RAW & other format...It is based on GDI+ [1] and is capable of viewing image formats supported by GDI+, namely, JPEG, BMP, PNG, GIF (including animated GIFs), ICO, WMF, EMF and TIFF format files.
RAW image formats used by high-end professional cameras are also supported by installing their respective WIC codecs which NEF codecs. You might wanna check this:
Nikon Imaging | Global Site | NEF Codec Download
this has the NEF codecs for D80 camera.
Hope this resolve the issue, if not then lets know so we can check it for you....