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Operating System Not Found (after IE 7 x64 install)

By Adam S ·
This should make for a good brain teaser. This has happened consistently 3 times.

I am installing W2K3 Enterprise Server R2 x64 on an Intel 5000V motherboard with two WD Velociraptors. RAID is disabled. The primary drive is partitioned (30/250), the secondary is not.

I am able to install the OS, boot into it, install the motherboard and network drivers, rebooting between each installation, and get to Windows Update (through the Windows Server Post-Setup Security Updates wizard). Upon scan, the only critical update offered is Internet Explorer 7 x64. I install it and after post I get an "Operating System Not Found" error. Here's the kicker: If I put in the W2K3 install Disc 1, I will be prompted to boot from the CD by hitting any key (which I can do without a problem) and upon timeout the system boots flawlessly. If at the error I put in another type of disc (like Disc 2, for example) and press a key I get the same "not found" error.

This only occurs after IE 7 x64 installs. Subsequent updates do not remedy the problem. I can always just leave Disc 1 in the CD drive, but...bleh. What an awful solution.

I just discovered that the motherboard disc (a Supermicro system) looks like it is bootable to FreeDOS and tries to boot, but then happily goes on to the hard drive. Perhaps my problem lies in either the motherboard drivers or the network driver, since I had this disc in the drive during their installs and reboots.

Anything else you would try?

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