[Q] FAILED (remote: signature verify fail) no matter what i try in fastboot

I hate a Sprint HTC One m7- i have had it for a few years. have been running viper v7 and TWRP for a while, was getting it ready update to Viper v8 and was working on updating firmware, the RUU wouldn't flash so I fallowed a few topics and screwed something up. At some point I fastbooted a command (maybe ADB but think it was fastboot) that changed the Android ver to another number , I am looking for the Forum i got the info from but cannot find it in my history.



Anyways, Now i have no OS and no revoery, it boots directly to fastboot, anytime i try and fast boot TWRP or CWM i get

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C:\android>fastboot flash recovery recovery-clockwork-touch-6.0.4.8-m7spr.img

target reported max download size of 1481973760 bytes

sending 'recovery' (8758 KB)...

OKAY [ 1.092s]

writing 'recovery'...

(bootloader) signature checking...

FAILED (remote: signature verify fail)

finished. total time: 1.981s

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When I try to run an RUU it stalls at Signature checking.



Any help on fixing this would be great. If I can find that forum topic i will post it ASAP

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