[Q] G900FXXU1BOB7 Won't root topic

I keep getting this showing up while phone is trying to boot up so now it won't boot.
'Recovery is not seandroid enforcing'
I've fixed it by flashing the firmware again but now i want to root.
Any help?

G900FXXU1BOB7 Android 5.0 OTA for United kingdom region topic

Official Firmware G900FXXU1BOB7 Android 5.0 download and Update for Galaxy S5 (Snapdragon) SM-G900F. G900FXXU1BOB7 Android 5.0 released for United kingdom
http://best-tech-reviews.com/update-...roid-5-0-3140/

cant root G900FXXU1BOB7 help please topic

i dont know whats going on but i cant root G900FXXU1BOB7 also cant install twrp or cwm any ideas anyone