I have a bootable USB drive full of computer repair tools. I would use it to repair a computer that might very well be infected by a virus or other malware. I would like to know how I can prevent malware from spreading to my USB drive.


  • There are already questions about this that are about spread from USB to COMPUTER but I could not find any about COMPUTER to USB.
  • This solution would have to be Windows-based but not computer specific.
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    Write protect the device in question. – Ramhound Apr 23 '18 at 22:12
  • Any write protection solution I can find either is pc specific or requires solutions that are permanent and cannot be undone. I want this to be un-doable in some way. – ricky gonce Apr 23 '18 at 22:14
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    How large is the USB drive? A new USB drive that has 32GB capacity costs about $10. Just make a copy of your tools, use it and then—when you feel you are done—erase the drive. – Giacomo1968 Apr 23 '18 at 22:26
  • That is a possibility, but I was hoping to avoid having to do that every single time I work on a pc... – ricky gonce Apr 23 '18 at 22:28
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    @rickygonce Then use optical media. Boot from a CD or DVD. No write = no problems. – Giacomo1968 Apr 23 '18 at 22:30

Buy a USB stick with a physical "Write Protected" switch. I've used one in the past and been unable to casually write to it while the switch was in the proper position. Of course, if you want to boot from it, you have to use an OS tolerant of the read-only state, like a LiveCD. I don't know what OS you're using currently, but you have some options.

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