.
1. What are index.dat files? 

This content (html files, pictures, display, java scripts and other) is saved and saved to your pc, when you visit a website. That is called the cache or Temporary Internet Files. Whenever a cache entry is saved, it'll also place a pointer to the cache files in the index.dat file. Internet Explorer uses Index.dat files to keep track of traditional information (the cache) like an index in the end-of the book. To compare additional info, please consider looking at: <a href="http://shriekers.info/?p=750">Sliding Glass Door Fix