can someone help me pls
my htc desire is stuck at the htc logo screen.
phone not rooted.
i dont know what to do

Try to remove the battery, and leave it for some time. then try to switch on it back..
can ask at htc desire official thread.

maybe you can try this method

If you cannot turn on your phone or access the phone settings, you can still perform a factory reset by using the buttons on the phone.

1. With the phone turned off, press and hold the VOLUME DOWN button, and then briefly press the POWER button.
2. Wait for the screen with the three Android images to appear, and then release the VOLUME DOWN button..
3. Press VOLUME DOWN to select CLEAR STORAGE, and then press POWER.
4. Press VOLUME UP to start the factory reset.

works!!!!! thanks kon
but sadly all data deleted and ive no backup
luckily contacts recently backed up

Always save your contacts and calendar entries to your Gmail account, not HTC Sync. Annoying lah, why does HTC make that the default?