Server application error

I don't know when this problem always occurs in IIS. I am going crazy. HTML files can be browsed. This problem occurs if ASP files are encountered, and the simplest ASP files cannot be parsed. After calling N for a long time, this problem cannot be solved.
1. Restart IIS without any effect. The error persists.
2. Restarting the computer is still an old problem.
3. I started to suspect that there was a problem with the ASP. dll file, but I still cannot register it again.
4. It is still an old error to re-register other components.
5. I searched for n more materials on the Internet. The most common information is that the passwords are not synchronized. The above method still does not work.
6. re-install iis5.0. It's hard to install it. (Crash ......)
7. Forget it. I want to retry the operating system. The broken operating system has problems everywhere, such as browsers, folders ...... How to use it.
8. Finally, the operating system is installed, patched, and installed.Program......, This time it was really a crash, crazy, computer crazy, I am also crazy, the problem is still. Server application error
9. view the system log file:
"DCOM encountered an error" overlapping I/O operations in progress. "And cannot log on to the. \ IWAM_CCNU-8A760083A4 to run the server:
{3d14228d-fbe1-11d0-995d-00c04fd919c1 }"
10. after searching for the error code, I know that the COM + application has encountered an error. I still cannot solve the problem by using the method provided by others. I have no way to synchronize the password or start the service. The "user" in the "Identity" is changed from a general user to the Administrator, and the service cannot be started.
11. Finally, I tried it myself and got it done. "Start"-> "set"-> "Control Panel"-> "Administrative Tools"-> "component service, "console root directory"-> "component service"-> "computer"-> "my computer"-> "COM + application, there is an "IIS Out-of-process pooled" right-click "attribute" -- "ID" -- Adjust "this user" to "Interactive User -- currently logged-on user ". Then click "OK" and Right-click "start ".
The process is really complicated ....... I am so unlucky today. This is a problem that has taken me for a long time.