What do you mean by "generic" thumbnails? You may want to check the folder options, to see if Windows 7 is actually generating thumbnails for your content.
Either that or you need to have opened the file/photo, etc... first. I've found that after opening a photo or pdf file, it will get rid of the generic pic and insert a thumbnail of the file in question. If that doesn't do the trick, try toggling the view slider to see if that gets the thumbnails to show.
-------------------------------Kevin
Desktop: Q9400(stock,lapped,SpinTechQ)/Intel DP43TF/VTEK 4850(512)/8GB DDR2 800Mhz/X-Fi Titanium Pro/Liteon BD-ROM/Velociraptor/Windows 7 Pro 64-bit
Laptop: Toshiba Satellite (M305)/T6400/4GB DDR2 800Mhz/Windows 7 Pro 64-bit (for now)
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