named server failed logon after installing MS04-011 patch

Need help urgently
I have on win 2000 machine a default SQL Server (local) & a named SQL Server instance (for separate web machine)
After installing the MS04-011 Patch last nite, the named SQL Server fails to startup on reboot or manual. The default server on the other hand is running. But I cannot use the default server as it requires access within the local machine only
I tried uninstalling the patch, but it still cannot get the SQL server running again.
HOW CAN I RECOVER THE SQL Server Instance'
Additional info: On logon, following error massage
"NtUninstall Q8877565\WinSys.cer" not foun
before and after the uninstall of the patch.What error do you get when you start it? Is there anything in he SQL Server
errorlog when it fails?
Rand
This posting is provided "as is" with no warranties and confers no rights.|||Thank Rand for responding
The Error is simply Login Failed. Service Manager shows the instance is stopped, while the Default Instance (Local) is started. Click start, and return Login Failure again
Any idea what's wrong and how I may recover the Instance
Almo|||Error listing end at the last restart after patch install. That is, never restart again
Almo