Microsoft KB # 329891 says it could be from missing registry settings. Perform the following steps to fix:

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• Click Start, and then click Run.
• In the Open box, type cmd, and then press ENTER.
• In the Command window, type regsvr32 mshtml.dll, and then press ENTER.
• Click OK to confirm that the registry entry has been added.
• In the Command window, type regsvr32 shdocvw.dll -i, and then press ENTER.
• Click OK to confirm that the registry entry has been added.
• In the Command window, type regsvr32 shell32.dll -i, and then press ENTER.
• Click OK to confirm that the registry entry has been added.
• Close the Command window.

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Sometimes removing or disabling Windows (or MSN) Messenger 
causes OE to open slowly. This will be shown by an entry 
in the system error log:

The server {FB7199AB-79BF-11D2-8D94-0000F875C541} did not 
register with DCOM within the required timeout.

To fix this, open Regedit and navigate to this key:

HKEY_CLASSES_ROOT
\CLSID
\{FB7199AB-79BF-11d2-8D94-0000F875C541}
\InProcServer32

In the right-hand pane, double-click on the (Default) 
value and delete whatever is entered there, leaving it 
blank. Click OK. Now perform exactly the same step 
with the key directly underneath, namely

HKEY_CLASSES_ROOT
\CLSID
\{FB7199AB-79BF-11d2-8D94-0000F875C541}
\LocalServer32

Once both (Default) values are empty, OE will open 
normally

I hope this fix makes a few people happy 

Phil-Magik
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Start .. Run .. type this and hit enter: "%SystemRoot%\System32\SFC /scannow"

(SFC doesn't work in Safe Mode .. FYI)

===   ===   ===   ===   ===   ===   ===   
Windows File Protection could not initiate a scan of 
protected system files.

The specific error code is 0x000006ba [The RPC server 
is unavailable.]
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EventID.net

Event 7 is probably from the same trouble

"
Storage device "Seagate 1" reported an error on a request to write a file mark to media.

Error reported:
Physical end of tape encountered.

^ ^ ^ ^ ^
"

extra info:

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C:\>sfc /scannow
Windows File Protection could not initiate a scan of protected system files.

The specific error code is 0x000006ba [The RPC server is unavailable.
].
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Microsoft KB Q296241 has one possible fix ..

I brought up a CMD prompt and did this just fine "C:\Winnt\System32\SFC /scannow"

HuntBar:
had very strange registry trouble with this key "HKLM\Software\BTIEIN" .. permissions were all messed up and owner was funky unknown user .. take ownership and set permissions properly right before deleting this lil bugger .. all is well now !!

more info

Google search engine hijack was fixed after this was removed:
ALEXA

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obj[0]=RegKey : SOFTWARE\Microsoft\Internet Explorer\Extensions\{c95fe080-8f5d-11d2-a20b-00aa003c157a}

.. and iexplore.exe crashed while adaware was scanning PMEMNT.SYS now all is really fine :)