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J.R. SitmanFlag for United States of America

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All flash drives fail when plugged into laptop USB

We have a laptop that when any (we tried 5) flash drive is plugged in it either fails installing the drivers or it installs and states it is Write Protected.

I did run MalwareBytes on it and found 5 items that I removed.  One was a trojan and another was a backdoor.

Any advice would be helpful.  I'm considering a re-installation of the OS
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xaichen

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Thanks I'll post later
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I had to do both of these to fix it.  Thanks

Also if you search USBSTOR.SYS in the registry of a working machine (there are only a few matches),  check the same registry keys are present on the faulty machine. Maybe also try replace the usbstor.sys file with one from a known working machine.

Now delete all devices in device manager  that are not in solid black
Reboot and test
tx for feedback !