I'm not apologizing if this comes off as conspiracy, but you guys shouldn't be naive or forget that Microsoft is a business and if they lose sales of Win 10 to their own previous OS discovered by their own marketing and statistic department, then of course generating some hype or hysteria would help sales. After all, a dollar for MS isn't a dollar for MS if it interferes with a new product roll out.
I'm not saying these "randomwares" aren't real, I'm just saying take it with salt; I've never (yet) experienced it, while someone else could have and then got Windows 10 (congratulations to MS for the successful campaign).
If I get Windows 10, it won't be because I'm afraid my current OS is up for grabs, is has to be because I want the features and support of new applications that MS is trying to isolate to make the OS more appealing. I'd like to think the rest of you that went on to 10 did it because you wanted to, not because MS' scare tactics about your previous OS worked.