Erm, yes, I did point out the phone had to be connected and in fastboot mode when you manually installed the fastboot drivers... What exactly was your issue?
The PC is gonna use one of several drivers for the phone, depending on what mode the phone is in. It uses different drivers in fastboot mode than it does in recovery mode, which are different from the drivers when it's running normally.You'll need to manually install the drivers through the device manager while the phone is in fastboot mode and connected to the PC (right-click -> Update Drivers -> Browse Computer -> Let Me Pick -> Have Disk).
The drivers should be located at:
You'll want the 'Android Bootloader Interface' driver.
That probably meant the phone wasn't in fastboot mode when you manually installed the drivers the first time. That, or your PC has more pressing issues than an odd driver reversion.
fastboot flash cust-unlock unlock_code.bin
fastboot oem unlock
I'd imagine a factory restore (via booting to the recovery partition) would re-install that no problem. Also wipe your data, but that's gonna happen when you get to the bootloader unlock anyways.
OK, that's neat.you do NOT need to carrier unlocked for bootloader unlock use this...... debloat script oneplus through ADB an once finished OEM UNLOCK will be ungrayed. then you can request a unlock token from oneplus then wait 7 days then flash an unlock bootloader.
im still carrier locked