IE 10 is a technology called ForceASLR that s meant to help compensate for the fact that not every application on Windows is compiled with the flag that opts them into ASLR. Microsoft security officials say that this is among the more important additions the company has made to the security of its browser and Windows machines. The biggest change is a new loader option used by Internet Explorer 10 to instruct the operating system to randomize the location of all modules loaded by the browser, even if a given module was not compiled.
Source: https://threatpost.com/microsoft-adds-new-exploit-mitigations-ie-10-031312/76321/