Let’s address the elephant in the room. PassMark does offer a free, fully functional portable version.
Don’t just put BurnInTest on a drive. Build a full diagnostic toolkit:
If you do not have a license and just want the free trial in portable form, use these reputable sites (ensure you select the "Portable" or "USB" tag):
This is perfect for:
Now that your USB is ready, here is how to use it on a target PC:
To run BurnInTest portably, you must first install it on a "technician" PC and then transfer it to your removable drive using the built-in utility: