IIS6 Error 500

I don't know about mixed debugging!
IIS6 + isa2004
Debug the IIS fracture listener with httpcfg
Result port 80 cannot be opened! Always report anotherProgramThe process cannot access this file.
Depressed
Result 90: other sites can be started.
However, ASP programs cannot be used.
Htm row
Depressed!
Always package 500 Error
There are no obvious prompts in the log.
Error 500 found
A bunch
In the doscommand line state, enter the following commands and press Enter:
Regsvr32 jscript. dll (command function: Fix Java Dynamic Link Library)
Regsvr32 VBScript. dll (command function: Fix VB Dynamic Link Library)

That's all!
Alas! I still don't quite understand what went wrong.