frozen screen...why?

[Android Question]

I was on a web-site and the screen frooze....this has happened twice in 3-days.
I cannot turn off the android....the battery has to run out then I can recharge the
android to normal....how and why the frozen scree. android 2.3.3 I did not add
any apps to the android.

 

[Rukbat]

Not enough information.

Make and model of device.
Amount of free storage?
Is it rooted? (If you don't know it probably isn't.)
Have you burned any ROMs to it?