Still don't understand why everyone hates windows 10 so much. Its actually the best besides from XP. 7 was decent. 8 was fucking horrible but 10 has been the best at the moment but yeah keep your windows 1999. I will stay safe in my windows 10.
Im not sure whether ur on PC or on laptop. On laptop its good, on PC was fucking bad.
1- After some months when it was released, the majority of people had downloaded it, but at that time it was unstable and many were forces to take a step back to windows 7 (Including me).
this experience makes me not to install it anymore/waste time.
2- Software incompatibilities
3- Not to mention the "Privacy freaks" number which is very high.
4- Gimme the money and maybe ill upgrade
Windows 10 might be better at some points, but this far windows 7 is irreplaceable.
EDIT: Not to mention that windows 10 is not WannaCry proof, so your argument is invalid in every single point.
EDIT #2: 1 more reason: