Last Known Good config?

[cpjust]

Hi,
After installing a new driver today, I rebooted and it told me Windows couldn't load because drivers\pci.sys is missing.
I rebooted with Last Known Good configuration and it came up fine, so I copied pci.sys to C:\ and rebooted, but to my surprise, Windows loaded just fine this time.

When you choose Last Known Good, does that previous configuration become permanent? I thought it was a one time deal?

Is there a way to go back to my broken config and copy the missing file, or should I just be happy it boots and leave it at that?

 

[ATLMatt]

My understanding of Last Know Good Config was that it makes a change back to a previous config, but I don't know that as fact. If everything is working propperly, I probably wouldn't mess with it, just check your logs for errors.

 

[linney]

Last known good configuration
thread779-1406367


I think these notes are from the Help and Support Center program.

"Feature: Last Known Good
When to use it: When you suspect that a change you made to your computer before restarting might be causing the failure.
What it does: Restores the registry settings and drivers that were in effect the last time the computer started successfully.
Available on: Windows XP Home Edition and Windows XP Professional.
For more information, see To start the computer using the last known good configuration.

Notes

Choosing Last Known Good Configuration provides a way to recover from problems such as a newly added driver that may be incorrect for your hardware. It does not solve problems caused by corrupted or missing drivers or files.
When you choose Last Known Good Configuration, only the information in registry key HKLM\System\CurrentControlSet is restored. Any changes you have made in other registry keys remain.
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