My phone appears to have crashed

. It won't do anything - all I get is the Force Close pop up saying "The application HTC Sense(process.com.htc.launcher) has stopped unexpectedly. Please try again." If I press Force Close, the pop up just reappears time after time. I have tried powering the phone off and on several times but to no avail.
When it happened, I was trying to scroll through the weather on the HTC weather widget. This has happened several times before with this widget but until now I have always got round it one way or another. PLEASE can someone help me - I have no idea what to try now.


. It won't do anything - all I get is the Force Close pop up saying "The application HTC Sense(process.com.htc.launcher) has stopped unexpectedly. Please try again." If I press Force Close, the pop up just reappears time after time. I have tried powering the phone off and on several times but to no avail.When it happened, I was trying to scroll through the weather on the HTC weather widget. This has happened several times before with this widget but until now I have always got round it one way or another. PLEASE can someone help me - I have no idea what to try now.
. I eventually managed to downlaod and instal the Laucher2 app, backed up all apps/data and did a factory restore and the Sense will STILL NOT LAUNCH - still getting the force closing. Can use the phone with the Nexus interface but I want to use Sense. Where on earth do I go from here. Back to HTC??