Tweaking the Internet Settings
There are mainly four different functions that are carried out if the Internet settings are reset.
1. Browser settings are reset: installed extensions, tool bars, add-ons, and plug-ins are reset here to the default settings.
2. The kind of extensibility entry points that the user installs will not run automatically. The startup extensions will also be disabled.
3. The browsing history, forms, tables, passwords, cookies, and temporary internet files will be cleared off.
4. The default settings that were initially set by the user will automatically be restored.
So, if the Internet Explorer keeps closing for no reason even after trying the basic steps, you may try resetting the internet settings. It is quite possible that one of the above-mentioned steps will fix the issue, otherwise contacting Microsoft support or taking a look at their communities and forums, is always advisable.
Warning: Once you restore the defaults, you'll lose your current settings and there's no way to recover them back.