This QHSUSB_DLOAD unbricker is actually for a limited, narrow case of QHSUSB_DLOAD errors stemming from the use of the Lazypanda S-Off technique. This won't fix all QHSUSB_DLOAD errors, and if I'm reading your post right, probably won't solve yours.Well, I have the dreaded QHSUSB_DLOAD error. I had my phone set to use lagfix at night, and I'm pretty sure that's what caused it. I've been looking through the thread, and all the fixes I saw required a linux box. Is there any way to fix this on windows?
As a side note, you should really learn how to boot into Ubuntu off a USB thumbdrive--it's very straightforward and easy (just requires downloading the appropriate Ubuntu *.ISO as well as the free thumbdrive creation program, and an empty USB drive), and you can then boot from the USB thumbdrive anytime you need to do phone hacking from a linux environment. It doesn't do anything to your current PC configuration.