Windows Explorer has stopped working....

When ever I try to open up a folder to view files, it freezes and a windows pops up and says "Windows Explorer has stopped working..." and 2 seconds after that it says "Windows Explorer is restarting..." and my screen flashes and the toolbar at the bottom goes away and cames back.

I have tried many things and this is still happening. Please help!

Here is my system information:

OS Name: Microsoft® Windows Vista™ Home Premium
Version: 6.0.6002 Service Pack 2 Build 6002
Other OS Description: Not Available
OS Manufacturer: Microsoft Corporation
System Manufacturer: Hewlett-Packard
System Model: HP Pavilion dv6700 Notebook PC
System Type: X86-based PC
Processor: Intel(R) Core(TM)2 Duo CPU T5550 @ 1.83GHz, 1833 Mhz, 2 Core(s), 2 Logical Processor(s)
BIOS Version/Date: Hewlett-Packard F.59, 11/25/2008
SMBIOS Version: 2.4
Windows Directory: C:\Windows
System Directory: C:\Windows\system32
Boot Device: \Device\HarddiskVolume1
Locale: United States
Hardware Abstraction Layer: Version = "6.0.6002.18005"
Installed Physical Memory (RAM): 3.00 GB
Total Physical Memory: 2.99 GB
Available Physical Memory: 1.28 GB
Total Virtual Memory: 6.19 GB
Available Virtual Memory: 4.25 GB
Page File Space: 3.28 GB
Page File: C:\pagefile.sys

This happens alot in Windows Vista and Windows 7 Unfortunately you cannot do anything about it, And also when the Taskbar disappears and comes back- This is Normal the Taskbar is Windows Explorer

Many Thanks,
Josh