Windows Explorer has stopped working

running windows 7 home premium 32bit. worked fine until yesterday. every time I logon I get this:

Windows Explorer has stopped working

I cannot access any of my files the normal way, instead I have to use task manager

Problem signature:
Problem Event Name: APPCRASH
Application Name: explorer.exe
Application Version: 6.1.7600.16450
Application Timestamp: 4aeba271
Fault Module Name: StackHash_0a9e
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Code: c0000005
Exception Offset: 00111000
OS Version: 6.1.7600.2.0.0.768.3
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

help

Hi Captain,

A few quick questions -
Have you done this?

*Type event viewer in search.
*Go to the windows Logs>applications tab.
*Note errors (they have red in the left column) that relate to app hang, app crash, or DEP.
*Record the Event ID and source codes and tell us what they say.

What browser are you using?

Please also fill in your System Specs to better enable us to help you.
Instructions are under my signature.