I have 8 GB USB. The USB is made bootable using multisystem software. I use this USB as writable removable disk alongside bootable for a long time. Some days ago, I inserted the USB in a windows pc and then that pc put a application named USBSecurity.exe in my USB without my permission.

See the screenshot of my USB.

enter image description here

Now, I can't write anything in my USB. It is read-only. How can I fix this problem?

There is a related question asked earlier. But, my question is bit different that my USB is bootable but that not. And the answer provided to that question doesn't work for me.

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    Possible duplicate of How to remove write protection from a flash drive? – Android Dev Nov 28 '17 at 13:50
  • @AndroidDev that's solution not work for me and that USB not bootable but mine is. – alhelal Nov 28 '17 at 14:02
  • Would it be OK for you to: 1. copy the personal files from your USB drive to another drive; 2. create a new partition table and file system (with or without an operating system using Multisystem or some other tool)? Or is it important to repair the current content of the USB drive (more difficult)? – sudodus Nov 28 '17 at 14:53
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    The date seems wrong, 1970 ? Anyway, as a test perform chmod 777 on your mount point, before mounting your pen. You can always change permissions to something more sensible later. Also, are you logged in as alhelal ? – hatterman Nov 28 '17 at 18:36
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    I see that you want to repair the pendrive. I hope that you will save time and effort compared to copying the files and creating the three operating systems again. Good luck :-) By the way, systems in USB pendrives are very sensitive. When you have a working drive again, please make a cloned copy of it, so that you can easily get back to a working system, when there are problems next time. – sudodus Nov 28 '17 at 19:31

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