REGFuck is a tool that can corrupt your Windows Registry, leading to all sorts of different effects, including weird themes, errors and of course totally destroyed systems.
It lets you configure a global chance of corruption and relative chances to different root keys of the registry. It also has a chance to delete values instead of corrupting random data inside of them.
There is the ability to re-use random seeds, however, it is useless, because it depends on the layout of your registry, meaning, on a different system you won't get the same results with the same seed.
The GUI is designed to look very bad and unprofessional. It contains animated GIFs as background images, stock images with watermarks, bad spelling, Comic Sans, controls not responsive to the window size and an overall weird layout. It's meant to parody badly designed GUIs you will find in those script kiddie phishing "hacker tools" commonly found on YouTube. Also, I did not change a single default control name.
The code isn't good either, which I did on purpose, because it was more of a test for an advanced program (see below). The tool won't get developed further.
I'm working on a totally new tool, made just for destroying Windows and featuring lots of new stuff, including PE (exe file) corruption, plugin support and a GUI that makes sense.