Ment
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I see your point. It's just a bit weak. What if you encounter such a noob that by the time you arrive, they've already messed up all 4 Windows installations? So, here's my advice: next time, install at least 10 Windows on each of the 10 partitions you create on the noob's HDD!
P.S. Sesame, you understand, right? On your virtual machine, you split your 10GB into halves and install 2 Windows on each piece!