windows explorer crash

every time i go into my folder that is filled with videos windows explorer stops
respond and then restarts closing the folder in the process

Have a look at the folders properties > security tab whether "system" has all permissions.

yes it has all permissions

it crashs now even without the folder being open Wtf

what would cause this

Have a look here Control Panel\System and Security\Action Center\Reliability Monitor to find more details about the crash. The events should be marked with a red circled x.

Log Name: Application
Source: Application Error
Date: 29/03/2010 00:53:39
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: James-PC
Description:
Faulting application name: explorer.exe, version: 6.1.7600.16450, time stamp: 0x4aeba271
Faulting module name: QTCF.dll_unloaded, version: 0.0.0.0, time stamp: 0x4aa21f2c
Exception code: 0xc0000005
Fault offset: 0x6b45c11b
Faulting process id: 0xd58
Faulting application start time: 0x01caced1767d2480
Faulting application path: C:\Windows\explorer.exe
Faulting module path: QTCF.dll
Report Id: 214ff9f0-3ac5-11df-92bf-001d6095810b
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Application Error" />
<EventID Qualifiers="0">1000</EventID>
<Level>2</Level>
<Task>100</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2010-03-28T23:53:39.000000000Z" />
<EventRecordID>74485</EventRecordID>
<Channel>Application</Channel>
<Computer>James-PC</Computer>
<Security />
</System>
<EventData>
<Data>explorer.exe</Data>
<Data>6.1.7600.16450</Data>
<Data>4aeba271</Data>
<Data>QTCF.dll_unloaded</Data>
<Data>0.0.0.0</Data>
<Data>4aa21f2c</Data>
<Data>c0000005</Data>
<Data>6b45c11b</Data>
<Data>d58</Data>
<Data>01caced1767d2480</Data>
<Data>C:\Windows\explorer.exe</Data>
<Data>QTCF.dll</Data>
<Data>214ff9f0-3ac5-11df-92bf-001d6095810b</Data>
</EventData>
</Event>

the Reliability Monitor is showing no data but above is what i got off event viewer

i have installed divx real player today
so in total i have 7 video player installed on my computer

Although this was posted for XP, it may give you some ideas 0xC0000005 Access Violation Error