Windows 7 explorer crash

[tzfrantic]

everytime i i drag a video from my folder to play on a video player it says explorer has stopped working
what is wrong
Log Name: Application
Source: Application Error
Date: 04/04/2010 00:11:53
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: encsession.dll, version: 11.1.0.2848, time stamp: 0x481a74be
Exception code: 0xc0000005
Fault offset: 0x0008c3b2
Faulting process id: 0x86c
Faulting application start time: 0x01cad380a9226464
Faulting application path: C:\Windows\explorer.exe
Faulting module path: c:\program files\real\realplayer\converter\Producer\Tools\encsession.dll
Report Id: 49d74044-3f76-11df-84d5-001d6095810b
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="2010-04-03T23:11:53.000000000Z" />
<EventRecordID>76971</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>encsession.dll</Data>
<Data>11.1.0.2848</Data>
<Data>481a74be</Data>
<Data>c0000005</Data>
<Data>0008c3b2</Data>
<Data>86c</Data>
<Data>01cad380a9226464</Data>
<Data>C:\Windows\explorer.exe</Data>
<Data>c:\program files\real\realplayer\converter\Producer\Tools\encsession.dll</Data>
<Data>49d74044-3f76-11df-84d5-001d6095810b</Data>
</EventData>
</Event>