HTC One - Phone stuck at white HTC start-up screen

[Ashish Ladva]

Hi there,
Yesterday I restarted my phone because Chrome browser wasn't working. Since then my phone has been stuck on the white HTC start-up screen.

I've loaded up bootloader in a "RELOCKED" status. My OS is 2.24.401.8 with S-ON. I've found the file "Guru Reset_M7_2.24.401.8.zip" and have pasted the file without unzipping into my mini-sdk file. I've tried got on to command prompt, navigated to the mini-sdk file and tried flashing the zip file but get the error message "signature verify fail" each time. I've tried flashing a TWRP.img but still get the same message.

Any help would be greatly appreciated!

Thanks