Pirated WIndows? How?
Basically, I'd say no:
- any Windows version that might have been "pirated" is before Win10, and those don't get any updates any more, so these arehighly susceptible to attacks since bugs don't get fixed
- the exception are some corporate environments, but in that case, the user would have to be real stupid to run a pirated windows in a corporate environment _and_ get a MS extended maintenance contract. Here, the user's stupidity would be the larger risk
- using a "pirated" Windows 10 also shows a remarkable amount of stupidity of the user, since you can perfectly legally download Windows 10 directly from Microsoft. Again, the risk here is not the pirating of the software but the amount of intelligence (or rather, its lack) the user is showing
- now, pirating of a Windows 10 product key _might_ be feasible, but not for any kind of machine that connects to the internet (i.e. could be used for online banking). Windows 10 is "phoning home" so much that MS knows about your pirated product key (aka license) basically before you're done entering the last few digits. Again, less a problem of the pirating and more a problem of the user's intelligence.
Finally, what makes you think that any pirated software comes free of little add-ons, like those that tell someone (not necessarily the person you bought it from) exactly what you are doing, including your PINs and passwords? Anyone selling or giving away pirated software surely won't scoff at that little extra income from selling your personal data. Ok, it's not much at the bottom of the food chain, but it adds up.
Sheesh, if you want a free OS, get Linux.