Downloading and using a file like "Microsoft Project 2010 portable.rar" is highly risky and likely illegal. Microsoft has never officially released a portable version of Project 2010. These types of files are typically pirated versions that have been modified by third parties. Why "Portable" Versions are Dangerous Description of Project 2010 SP2 - Microsoft Support

Conclusion

There are several benefits to using Microsoft Project 2010 Portable.rar, including:

If you just need to open an old Project file, you don't need the full software. Tools like ProjectLibre or GanttProject are free, safe, and can open/export Microsoft Project files. 3. Modern SaaS Tools