BOINC 6.2.4 won't install on fresh install of Windows 2000 SP4

[Ageless]

I've just tried installing 6.2.4 on another system of mine that runs Windows 2000 SP4. Prior to trying to install it I updated it on all MS updates as with the 5.10.45 that I tried, I got error 1053 all the time (something to do with a missing update to .Net 1.1).

I cannot install it as a service. Whenever I try, I get stalled at error 1920: no permissions. No matter how many reboots I do. It's a clean install, no prior BOINC on that system, as I delete all possible left-over 5.10.45 traces before going to 6.2.4

It only ran briefly after the install, but it kept telling me that I had to ask my administrator to add me to the group of people allowed to run BOINC. Which is weird as there's only one account on that whole system and that is the administrator. I didn't add any other accounts when I made it as it's primarily serving our TV.

So I did the reboot, to make sure Windows knew about the new accounts. Since that time I'm stuck at error 1920. Trying a repair install also stops at error 1920 when the service is started. I tried with and without allowing all users to control BOINC, both stop me with the same error as soon as the service is started.

Cleaned out the registry, did a reboot. Installed BOINC 6.2.4 for the one user only, with logging. It installed but told me I had no rights to control BOINC Manager. After 30 seconds the BOINC service stopped running and would no longer restart.

Event Type:    Error
Event Source:    Service Control Manager
Event Category:    None
Event ID:    7009
Date:        27/05/08
Time:        12:17:09
User:        N/A
Computer:    TVOUT
Description:
Timeout (30000 milliseconds) waiting for the BOINC service to connect.

Event Type:    Error
Event Source:    Service Control Manager
Event Category:    None
Event ID:    7000
Date:        27/05/08
Time:        12:17:09
User:        N/A
Computer:    TVOUT
Description:
The BOINC service failed to start due to the following error:
The service did not respond to the start or control request in a timely fashion. 

So I rebooted and then got stonewalled at error 1053 again. I'm wondering if http://support.microsoft.com/kb/886695 has to do with it, even though I am using Windows 2000. (And otherwise it's something for the elusive DLL initialization error that plagues BOINC still. It IS that same error message!)

Next I uninstalled BOINC, cleaned out the registry again, did a reboot and went to install again. This time with other users allowing control of BM. I logged the install again... but now the service refuses to start.

First I got an error 1923, when I ignored that one I ended at 1920.
Event Type:    Error
Event Source:    MsiInstaller
Event Category:    None
Event ID:    11923
Date:        27/05/08
Time:        12:32:16
User:        TVOUT\Administrator
Computer:    TVOUT
Description:
Product: BOINC -- Error 1923.Service BOINC (BOINC) could not be installed.  Verify that you have sufficient privileges to install system services.
Data:
0000: 7b 37 35 31 38 31 37 32   {7518172
0008: 37 2d 46 44 35 31 2d 34   7-FD51-4
0010: 36 36 31 2d 39 44 31 33   661-9D13
0018: 2d 34 36 36 44 38 41 33   -466D8A3
0020: 46 38 33 39 32 7d         F8392} 

Event Type:    Error
Event Source:    MsiInstaller
Event Category:    None
Event ID:    11920
Date:        27/05/08
Time:        12:32:54
User:        TVOUT\Administrator
Computer:    TVOUT
Description:
Product: BOINC -- Error 1920.Service BOINC (BOINC) failed to start.  Verify that you have sufficient privileges to start system services.
Data:
0000: 7b 37 35 31 38 31 37 32   {7518172
0008: 37 2d 46 44 35 31 2d 34   7-FD51-4
0010: 36 36 31 2d 39 44 31 33   661-9D13
0018: 2d 34 36 36 44 38 41 33   -466D8A3
0020: 46 38 33 39 32 7d         F8392}

[Ageless]

Still got the same problems on the clean install and fully updated Windows 2000 SP4 with BOINC 6.2.6

It won't start the service, getting error 1920 on that. When installed not as a service, BOINC Manager starts but it can't find the core client as boinc.exe never starts up.

Event Type:    Error
Event Source:    MsiInstaller
Event Category:    None
Event ID:    11920
Date:        29/05/08
Time:        11:59:42
User:        TVOUT\Administrator
Computer:    TVOUT
Description:
Product: BOINC -- Error 1920.Service BOINC (BOINC) failed to start.  Verify that you have sufficient privileges to start system services.
Data:
0000: 7b 38 35 31 32 39 35 30   {8512950
0008: 30 2d 39 46 32 45 2d 34   0-9F2E-4
0010: 37 33 30 2d 38 41 39 35   730-8A95
0018: 2d 39 34 44 45 43 34 45   -94DEC4E
0020: 42 35 42 30 31 7d         B5B01} 

Event Type:    Error
Event Source:    MsiInstaller
Event Category:    None
Event ID:    11920
Date:        29/05/08
Time:        12:01:47
User:        TVOUT\Administrator
Computer:    TVOUT
Description:
Product: BOINC -- Error 1920.Service BOINC (BOINC) failed to start.  Verify that you have sufficient privileges to start system services.
Data:
0000: 7b 38 35 31 32 39 35 30   {8512950
0008: 30 2d 39 46 32 45 2d 34   0-9F2E-4
0010: 37 33 30 2d 38 41 39 35   730-8A95
0018: 2d 39 34 44 45 43 34 45   -94DEC4E
0020: 42 35 42 30 31 7d         B5B01} 


Event Type:    Error
Event Source:    Service Control Manager
Event Category:    None
Event ID:    7000
Date:        29/05/08
Time:        12:01:44
User:        N/A
Computer:    TVOUT
Description:
The BOINC service failed to start due to the following error:
The service did not respond to the start or control request in a timely fashion. 

Event Type:    Error
Event Source:    Service Control Manager
Event Category:    None
Event ID:    7009
Date:        29/05/08
Time:        12:01:44
User:        N/A
Computer:    TVOUT
Description:
Timeout (30000 milliseconds) waiting for the BOINC service to connect.