Windows 8 PRO Free Keys

I have a few keys for windows 8.

DX6QP-7N6J4-7T247-TYCW6-RRDG7
WHK3K-N482H-BTY8Q-MKFJ9-3RPKV
W6V3Y-NCMH2-4X3Y8-2DTBB-X4PKV
X7B3J-GNVTB-QB8D2-JKC48-BWMQH
NC2CV-P7Q6H-QM9CJ-DXRCV-X73G7
DWV49-3GN3Q-4XMT7-QR9FQ-KKT67

if it fails, someone had used

They still working?

I dont know if someone used it. Try it :P

Don't work. All keys are blocked