trying to touch every window and panics, thinking it’s a virus. It "arrests" the file, putting it in quarantine. When WindowBlinds tries to start, it finds its decorator missing and throws the "problem with core files" error. Alternatively, a Windows Update

Open a support ticket at and attach the following:

Don't just click "Yes" on the error dialog. That standard reinstall rarely works for the "new" error.

// Iterate through the core files and calculate their checksums for (const auto& file : coreFiles) std::ifstream f(file, std::ios::binary); std::string contents((std::istreambuf_iterator<char>(f)), std::istreambuf_iterator<char>());