Explorer Address Bar error when navigating up - 'folder' is currently unavailable

I notice a problem or two in Windows Explorer.

The less serious problem: If I have navigated several sub-folders down on a

folder tree e.g. Users > Public > Public Documents > Intuit > QuickBooks >

Company Files and then start navigating back up by double-clicking the

parent folder in the Address Bar (in this example: QuickBooks), I'll get an

error saying that the sub-folder I started in is currently unavailable. In

this example the error would be:

Address Bar

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'C:\Users\Public\Public Documents\Intuit\QuickBooks' is currently

unavailable.

But then Explorer shows me the QuickBooks folder despite the error.

This occurs on a fresh installation of Vista Business Upgrade on a newly

formatted drive, with all Windows Updates installed (except SP1, which is

not automatically offered on this computer).

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The more serious problem: We use the veterinary industry's leading practice

management software (Avimark), which is a client/server application. The

app's EXE file is in a shared folder on a Vista Business desktop. More or

less regularly, when I try to run that EXE from this Vista Business laptop

client, I will get the error message: "The specified network name is no

longer available."

I get that error either when I open the share and double-click the EXE, or

when I try to run the program via Desktop shortcut on the laptop.

Typically the error occurs somewhere in the middle of loading this 13MB

program. The failure point seems random. Sometimes the program loads

completely.

None of the Windows XP client machines has this problem.

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Perhaps the problems are unrelated, and I'm prepared to address them

separately, but they seem similar to me on the points of resource

availability and perhaps a timing issue.

--John Hupp