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Windows Update error 0x80072efd (XP SP2)

puters are teh fun!

I'm working on this eMachines PC, which is fairly decent with Athlon64 3500+ (S939), Radeon Xpress 200M, 1024MB PC3200 (dual channel), 200GB HDD, running XP MCE (SP2). MSIE 6.0 was taking 20 ~ 30 seconds to open, some times longer. Other than little 'blips' of activity from the HDD and CPU every 4~5 seconds , the HDD and CPU were not being utilized. Other applications, the Start button, and context menus (right-click) would not respond until MSIE finally opened.

Trying to use Windows Update would result in an error (0x80072efd) after about three minutes of 'checking for updates'. The Windows Update log showed this PC has not successfully connected to Windows Update since 12/2005. lol! Third-party applications had no trouble accessing the internet.

So I start cleaning every temp file repository, fully disabled all security apps after scanning the system, checked the network settings, full disk and file system scan, used Autopatcher XP to install/reinstall all updates, blah blah blah. Tried some fixes that I found in relevant MS KB articles. Twice looked through every system setting I could think of, so on and so forth...nothing worked!

I had pretty much decided that a clean OS install was unavoidable, when I stumbled upon the cause. In Control Panel > Internet Options (Properties) > Advanced Settings, MSIE was set to "use HTTP 1.1 through proxy connections". Clearing this selection but leaving "use HTTP 1.1" completely solved the problem.

Now MSIE launches quickly, Windows Update and Defender update successfully. I looked through the advanced internet settings twice but completely overlooked it. I swear I've seen that setting checked before in other computers without any problems like this. Anyway...

Two days to find a mouse-click. I won't be forgetting that lesson anytime soon.
 
Hey I know it's a bit late now but for future reference you might want to know that the following entitle you to free support incidents from ms:

Problems installing updates, hotfixes or service packs.
Problems arising from installing updates, hotfixes or service packs.
Any problem that is later determined to be a bug in an MS product (not free up front but you get a refund).

The support guys have a whole bag of tricks for fixing this sort of things and can quickly lookup those errors or gather additional logs. That 0x80072efd for instance is one of:
ERROR_INTERNET_CANNOT_CONNECT
ERROR_WINHTTP_CANNOT_CONNECT

Glad you're working tho!
 
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