Windows explorer is not responding

My laptop vista has problem. need help
Each time when login , the icons in desktop or taskbar do not response to
mouse click.
and show a message:
Windows explorer is not responding
ask to select:
restart the program
or
close the program

If I select the close the program, than all the icons in desktop and taskbar
are disappear.

If I select restart the program, (it will warnning information will
missing )
and the computer will work then.

This steps repeat again each time I login.

The Problem show as

Description
A problem caused this program to stop interacting with Windows.

Problem signature
Problem Event Name: AppHangB1
Application Name: Explorer.EXE
Application Version: 6.0.6001.18000
Application Timestamp: 47918e5d
Hang Signature: e254
Hang Type: 513
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 1033
Additional Hang Signature 1: 6c418ee0e774d59b17c22a5f1f98101f
Additional Hang Signature 2: 4bae
Additional Hang Signature 3: 10f61f156bc986ce90234726c8dbb694
Additional Hang Signature 4: ebdf
Additional Hang Signature 5: 69265c3858baddac840d077814e3cc41
Additional Hang Signature 6: ac73
Additional Hang Signature 7: 3d45b45061ef17e7ebc9fbb0eed0adc7

Extra information about the problem
Bucket ID: 220412064

Some Windows Vista functions may not work, or Windows Vista may stop
responding: http://support.microsoft.com/kb/929833

I tried
sfc /scannow
do not find problems

I tried
chkdsk /f

also could not find problem

Please tell me someone has a solution for this problem. I now can only access the internet when i use Safari, every programs is not responding. From Task manager to Word to itunes I have access to nothing. I have a HP Pavilion dv6000, I have tried system restore and all the suggestions on this site to repair IE. Someone please help