How do I factory reset my HTC Desire? I got an old HTC Desire (the first model) which I need to reset.

I've tried to hard reset my phone using the instructions here: http://www.thefullsignal.com/htc/htc-desire/4989/how-hard-reset-htc-desire. But my phone just keeps booting as usual. Maybe I'm doing something wrong?

Are there another way for me to reset the phone? Maybe through ADT or something else?

Edit: I've forgot both which Google Account I used and the visual password (It's an old phone). So I can't log into the phone. That's why I want to do a hard reset.
You should be able to wipe via the recovery however, this will wipe all the data on the device including contacts, apps, pictures and videos.


Turn the power off. If your HTC Desire is frozen, pull the battery out and reinsert it
Hold the Volume Down button
Press and release the Power button
You are now presented with a menu that allows for Fastbook, Recovery, Clear Storage, and Simlock
Select Recovery
On the next screen press Volume Up and Power
You should then see the "Android System Recovery"
Select the 'Wipe data/factory reset' option
You may need to confirm your choice (i don't want to wipe the device i have so not 100% sure)