The more complex the problem is, the more trivial details and assumptions that you have to remove. Most of the answers you come across in programming can be simplified by doing the following: simplify things start with a skeleton of the problem taste it and remove more do it your way do one more thing repeat
Microsoft Product Activation has been cracked or circumvented on numerous occasions since it was introduced in 2001. In 2001, a UK security company called Bit Arts successfully managed to bypass product activation on Windows XP, while in 2003, volume license keys for Windows XP were leaked to the public, allowing users who had not purchased a volume license to the operating system to bypass activation. In 2009, several security flaws in Windows 7 were used by hackers to circumvent activation.
Reverse engineering has proven to be quite fun and addictive, it's a puzzle where you are trying to reverse engineer something that you don't understand (the idea of that being fun is up to you).
There are many hard problems in programming, I think some of the hardest problems are those problems that are very trivial. Sometimes, only by removing trivial details, and more importantly, simple assumptions, can these problems be solved. d2c66b5586