Starting with Vista, Windows comes with Address space layout randomization (ASLR). ASLR is a computer security technique involved in preventing exploitation of memory corruption vulnerabilities. In order to prevent an attacker from reliably jumping to, for example, a particular exploited function in memory, ASLR randomly arranges the address space positions of key data areas of a process, including the base of the executable and the positions of the stack, heap and libraries. There is a bug in Windows 8 and above that makes this technique useless, but you can fix it.
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