Browsers randomly crash

[hardcoresum41fan]

I have safari, firefox, and IE, and all of them keep on crashing!!!

here is the problem log

Problem signature
Problem Event Name: APPCRASH
Application Name: Safari.exe
Application Version: 3.525.21.0
Application Timestamp: 4856f653
Fault Module Name: StackHash_fd00
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Code: c0000005
Exception Offset: fc9402f0
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 1033
Additional Information 1: fd00
Additional Information 2: ea6f5fe8924aaa756324d57f87834160
Additional Information 3: fd00
Additional Information 4: ea6f5fe8924aaa756324d57f87834160

Extra information about the problem
Bucket ID: 940836159

i have vista home premium...dap is disabled

any suggestions??