BEX64 error when itunes download something or anytime

Hi,

I am getting this error all the time especially downloading some music or video. I just update today to newest version iTunes but i am getting this error all the time. I tried remove all / clean reinstall but same error.

Problem signature:

Problem Event Name: BEX64

Application Name: iTunes.exe

Application Version: 12.1.2.27

Application Timestamp: 55236b62

Fault Module Name: StackHash_2264

Fault Module Version: 0.0.0.0

Fault Module Timestamp: 00000000

Exception Offset: 000000000bc98d16

Exception Code: c0000005

Exception Data: 0000000000000008

OS Version: 6.1.7601.2.1.0.256.4

Locale ID: 2057

Additional Information 1: 2264

Additional Information 2: 2264db07e74365624c50317d7b856ae9

Additional Information 3: 875f

Additional Information 4: 875fa2ef9d2bdca96466e8af55d1ae6e

Please help!

Thanks