在系统中需要把数据导出到excel并且压缩，然后报了这个问题：

我在网站上找到了方法：

地址：https://social.msdn.microsoft.com/Forums/vstudio/en-US/2f923b6d-aebb-42ff-804d-21a3763d491b/com-class-factory-error-8000401a?forum=csharpgeneral

Hi Varun,

It should be the permissions problem.
Please have a try using the following steps to Configure DCOM:
1. Go to the Start-Run menu to type in "dcomcnfg"  and hit enter to load "Component Services" MMC.
2. Select the "Microsoft Excel Application" item through "Component Services" MMC->Component Services->Computers->My Computer->DCOM Config->Microsoft Excel Application
3. Right click and select Properties->Select Identity Tab->Select This user and add the Administrator accout and password
4. Select Security Tab, Under "Launch and Activation Permissions", Choose "Customize", Click "Edit" button, Add the everyone account and add all the Permissions.
5. Do the same thing in "Access Permissions" and "Configuration Permissions"

Best regards,
Guo

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