I have two operating systems installed on separate physical drives. One is from my old laptop, and I'm worried it might have malware since I previously installed some cracked applications and its Windows Defender is broken. I want to know if there's a way to completely isolate these two systems so they can't access each other. I've heard that just removing the drive letter in Disk Management isn't enough. Is there a better solution?
4 Answers
You might want to try using a boot manager that can help you manage which operating system you want to boot into, keeping them separate.
Instead of dual booting, which can lead to issues, consider making a hard drive image of one OS and using a virtualization tool like QEMU, VirtualBox, or VMware Workstation. This way, you can run one OS within the other without the conflict.
If you’re on Windows, you can set one of the drives to offline using Disk Management. It will remain offline after a reboot, but just remember this applies only to physical drives, not partitions.
A good way to ensure that the two operating systems stay isolated is to simply unplug the other drive while you work on the infected one. After you're done, you can use a tool like GParted from a USB drive to delete and zero out the infected drive. Once that’s done, plug your main drive back in, reformat the previously infected drive, and repurpose it as needed.

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