what is powrprof.dll and what happens when it doesnt work?

Answer 1

http://support.microsoft.com/kb/q188213/

Answer 2

SYMPTOMS
When you start Windows 98, you may receive the following error messages:

RUNDLL
Error loading powrprof.dll.
The system cannot find the file specified.
-or-
Error Starting Program
A required .DLL file, POWRPROF.DLL was not found.
These error messages may occur even if you disable LoadPowerProfile on the Startup tab in the System Configuration Utility tool (Msconfig.exe).
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CAUSE
This behavior can occur if the Powrprof.dll file in the Windows\System folder is missing or damaged. This issue can also be caused by a missing registry key.
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RESOLUTION
To resolve this issue, rename the Powrprof.dll file (if it exists) in the Windows\System folder, and then extract a new copy of the Powrprof.dll file from your original Windows 98 CD-ROM into the Windows\System folder using the System File Checker tool. To start the System File Checker tool, click Start, click Run, type sfc.exe in the Open box, and then click OK.

For information about how to rename a file, click Start, click Help, click the Index tab, type renaming, and then double-click the "Renaming files" topic.

For additional information about how to use the System File Checker tool to extract a file, click the article number below to view the article in the Microsoft Knowledge Base:
129605 (http://support.microsoft.com/kb/129605/EN-US/) How to Extract Original Compressed Windows Files

Answer 3

It's a windows power management program