SpeedDisc
Portable Windows disk cleaner — cache, temp files, Windows Update, Delivery Optimization. SFC, DISM, reports. Single file, no install.
Challenge
Create cleaning tool without marketing tricks, transparent and without installation. Technicians and users need something simple that doesn't promise speed miracles, doesn't disable critical services without permission, and clearly reports what it did.
Solution
Single portable executable with console menu, text report, MIT open source. Cleans only safe junk (temp files, Windows Update cache, thumbnails, Delivery Optimization). Offers SFC and DISM. Asks confirmation before disabling startup. Doesn't touch Prefetch, doesn't empty Recycle Bin, not a registry cleaner.
Result
Tool used by technicians for fast, safe Windows maintenance without bloatware. UTF-8 report documents what was found and changed. Available on GitHub under MIT license. Portuguese and English, 64-bit Windows.