Wireless problem, eventvwr warnings questions

On Windows XP Pro, I have lost the ability to use my wireless connection.
I have confirmed it's only on this PC, not the others on the home network.

Here are the warnings I see by running eventvwr.msc.
I think items 5-7 are related to the wireless setup, but don't know
where to start in correcting it.

For item 1, what service could the warning be referring to ?
Looking in Services, I see three owner names: Local System, Local Service and NetworkService.
Should I change all the owners listed as Local Service to Local System ?

Also, another thing to note, I spent the weekend repairing several broken services by
running sfc /scannow twice(after purging /dllcache), then installing BITS 2.5 from Microsoft.
Now I'm left with the wireless problem.

Any clues would be welcome.


==============================================================

1. SOURCE: Userenv
USER: NT AUTHORITY\SYSTEM

Windows saved user mycomputername\Mike registry while an application or service was still using the registry
during log off. The memory used by the user's registry has not been freed. The registry will be
unloaded when it is no longer in use.

This is often caused by services running as a user account, try configuring the services to run in
either the LocalService or NetworkService account.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.



2. Source: EvtEng
User: N/A

The description for Event ID ( 0 ) in Source ( EvtEng ) cannot be found. The local computer may not
have the necessary registry information or message DLL files to display messages from a remote computer.
You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for
details. The following information is part of the event: Service started.


3. SOURCE: btwdns
USER: N/A

The description for Event ID ( 0 ) in Source ( btwdins ) cannot be found. The local computer may not
have the necessary registry information or message DLL files to display messages from a remote computer.
You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details.
The following information is part of the event: Service started.

4. SOURCE: gusvc
USER N/A


The description for Event ID ( 0 ) in Source ( gusvc ) cannot be found. The local computer may not have
the necessary registry information or message DLL files to display messages from a remote computer.
You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for
details. The following information is part of the event: Service started.

5. SOURCE: RegSrvc
USER: N/A

The description for Event ID ( 0 ) in Source ( RegSrvc ) cannot be found. The local computer may not
have the necessary registry information or message DLL files to display messages from a remote computer.
You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for
details. The following information is part of the event: Service started.

6 SOURCE: EAPOL
USER: N/A.

The description for Event ID ( 2003 ) in Source ( EAPOL ) cannot be found. The local computer may not
have the necessary registry information or message DLL files to display messages from a remote computer.
You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for
details. The following information is part of the event: The event log file is corrupt..

7. SOURCE: EAPOL
USER: U/A

The description for Event ID ( 2002 ) in Source ( EAPOL ) cannot be found. The local computer may not
have the necessary registry information or message DLL files to display messages from a remote computer.
You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for
details. The following information is part of the event: The event log file is corrupt..