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Internet Explorer uses the cache for two reasons. The primary reason is for fast access to web pages. If the web page you visit hasn't changed since the last time you visited, Internet Explorer will load the homepage from the hard drive (the cache) instead of the web. To find the cached homepage on the hard drive, it searches in the index.dat file and the browser shows the local page. The cache will also allow users to access homepages offline.Every time a web site creates a cookie on your machine, IE will insert an entry in the cookies index.dat file that associates the homepage with the cookie file. Next time you visit that homepage, IE finds the cookie file through the index.dat file. Business - All business/finance/loan/mortgage related link can be found here Computers - All computer hardware/software/peripheral related link can be found here Internet - All webhosting/webdesign/internet marketing related link can be found here Software - All software related link can be found here Web Design - All web design/development related link can be found here Web Hosting - All web hosting related link can be found here Web Promotion - All search engine optimization/internet marketing related link can be found here Web Resources - All other web related link can be found here Recreation - All travel/hotel/cruise related link can be found here Casino - All online gambling/poker/blackjack/roulette related link can be found here Health - All online pharmacy/hospital/health related link can be found here Shopping - All online shopping/gift related link can be found here Miscellaneous - All other links can be found here Index.dat files contain url's to every web site you have visited since the installation of your Operating System. It also contains links to every picture and other Internet resource you have accessed. Index.dat files are in plain text and can be read by anyone capable of opening a file in Notepad. But this is not enough, index.dat file can't be removed manually easily. If you select it in Explorer and hit the delete button you will get an error message that it's being used. In other words, on your hard drive, there are plain text files called index.dat, they contains links to every web resource you have ever visited and you are not able to erase this file. Perhaps no further explanation is needed of why these files are a privacy threat?
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