RPC server is unavailable while opening Windows Media Player

When I try to play video clips,using
Windows Media Player,it stops
responding.When I click on it,a message
appears saying:

"The application is not responding.The
program may respond again if you wait.Do
you want to end this process?"
I eventually end the program,and get a
new error message:
"Windows Media Player has stopped
working.A problem caused the program to
stop working correctly.Windows will close
the program and notify you if a solution
is available."
Finally,i hit "Close program",and a
message appears:
"RPC server is unavailable.",continuing
with the path to the video clip I have
tried to play.
In the Event Viewer,incident is logged as
:
Faulting application
name:wmplayer.exe,version
12.0.7601.17514,time stamp:0x4ce7a485
Faulting module name:ntdll.dll,version
6.1.7601.17725,time stamp:0x4ec49b8f
Exception code:0xc0000006
Fault offset:0x0005aefd
Faulting process id:0x11c4
Faulting application start
time:0x01cd09e05aecf4d5
Faulting application path:C:\Program
Files (x86)\Windows Media Player
\wmplayer.exe
Faulting module path:C:\Windows\SysWOW64\ntdll.dll
Report Id:c262e7c4-75d3-11e1-ac1a-00262245fb8b
Log Name:Application
Source:Application Error
Event ID:1000
Level:Error
User:N/A
Task Category100)
Keywords:Classic
I have tried:
System Restore-unable to restore to any previous date
Clean boot
Safe Mode
Startup Repair function during start up
sfc /scannow
all without result.
The machine has all updates installed.
Looking forward to your responses.
Mario.

Eventual and seems the only possible solution-reinstalled system.