If browser bookmarks have not been backed up, the bookmark files may be found in the locations:
Firefox: C:\Users\[username]\AppData\Roaming\Mozilla\Firefox\Profiles\d4eq1ug6.default-1513179516155\bookmarkbackups
Chrome: C:\Users\[username]\AppData\Local\Google\Chrome\User Data\Default\Bookmarks
Internet Explorer and Edge: C:\Users\[username]\Favorites
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Also of note, Windows themes
C:\Users\[username]\AppData\Local\Microsoft\Windows\Themes