Often called the "open-source CCleaner," BleachBit is excellent for deep cleaning and offers a dedicated portable build.
If you see a link for "TuneUp Utilities Portable 2024," run away. That doesn't exist. Instead, master the built-in tools of Windows (Storage Sense, Task Manager Startup tab) and one modern portable cleaner. Your computer—and your cybersecurity—will thank you. tuneup utilities portable
“TuneUp Utilities Portable is excellent for quick, temporary cleanups on older Windows 7/8 machines, especially when you can’t install software. It’s fast, effective at removing temp files and invalid shortcuts, and leaves no trace. However, only download from trusted sources (e.g., major portable app repositories with user checksums), avoid its registry cleaner unless you know what you’re doing, and don’t rely on it for Windows 10/11 optimization. For a modern portable alternative, consider BleachBit Portable or Wise Care 365 Portable.” Instead, master the built-in tools of Windows (Storage
There are many benefits to using TuneUp Utilities Portable, including: It’s fast, effective at removing temp files and