Iis – Unexpected error 0x8ffe2740 occurred when trying to start an IIS6 website

Usually that's a COM object failing and ASP catching it. iisstate can help you catch the culprit. It will give you a log of what's going on and where the error is.

iisstate -p <pid of process hosting ASP pages> -sc <enter> 

As for your other error, is anonymous access allowed on the website in question? Whoever is generating the error doesn't have permission to write to the event log, which could be as simple as IUSR_ComputerName needing access. Or it could be much trickier. I'd need some more information.

This is my understanding of the issue so far:

• sc-win32-status 64 means “The specified network name is no longer available.”
• After IIS has sent the final response to the client, typically it waits for an ACK message from the client.
• Sometimes clients will reset the connection instead of sending the final ACK back to server. This is not a graceful connection close, so IIS logs the “64” code.
• Many clients will reset the connection when they are done with it, to free up the socket instead of leaving it in TIME_WAIT/CLOSE_WAIT.
• Proxies tend to do this more than others do.

Update: I found some interesting information here and here, so I basically re-wrote the page to ensure there wasn't any bad markup etc. and... the problem is now gone! It was just a shot in the dark, and I couldn't definitely say what it was that fixed the problem, since it was only affecting some of our clients under some very specific circumstances...