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 RE: error code 80004005
 Part of your Messenger client cache may be corrupted. 
 
To attempt to fix, close down Messenger if it's running, click Start, then 
Run, and type the 
following: 
%userprofile%\contacts 
and click OK. 
 
If nothing appears in the folder, click the Tools menu, then Options, then 
View tab, click 
'Show hidden files or folders' and click OK. Once you are able to see the 
folders, 
right-click the one that corresponds to your Passport and choose Delete. 
 
Next, click Start, then Run, and type the following: 
%userprofile%\Local Settings\Application Data\Microsoft\Windows Live Contacts 
 
Then remove the corresponding folder again in this folder. 
 
Then restart Messenger and try signing in again. 
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