Default Problem of Restarting when surfing in Net

Hi Guys,

This is Umanath and this is the first time i'm writing a post or thread so pls ignore if there is any error.

Actually i'm from india, i've got a HTC 7 Mozart from singapore. The thing is that my phone is automatically getting restart when surf in the internet and when i try to update the mobile connecting through laptop. so currently i'm not able to update the mobile by connecting to the . I've flashed the software in HTC service station but still facing the same problem.

Pls can any one help on this