http://www.winhelponline.com/blog/misc-registry-fixes-for-windows-7-xp-vista/
http://www.kellys-korner-xp.com/xp_tweaks.htm

Fix Folder Options :
http://www.raymond.cc/blog/restore-corrupted-folder-options-advanced-settings-caused-by-virus/

Fix File Associations = 
http://www.sevenforums.com/tutorials/19449-default-file-type-associations-restore.html
http://www.techsupportall.com/file-association-fixes/
