Yes, I've tried Reporting Startup Errors. And the error information has been posted in this discussion.

The bug information is listed below:

Could not read 'file:///C:/Program%20Files%20(x86)/Zotero/extensions/zoteroOpenOfficeIntegration@zotero.org/components/zoteroIntegration.xpt'.

Warning: unreachable code after return statement
Source File: resource://gre/modules/commonjs/toolkit/loader.js -> resource://zotero/bluebird/util.js
Line: 201 eval(obj)

No, I can't access the Help menu. This bug information was obtained by the starting the Zotero via the command line:

"C:\Program Files (x86)\Zotero\zotero.exe" -jsconsole

And the -ZoteroDebug parameter doesn't work in my computer.

The screenshot can be viewed by the link https://imgur.com/a/43nR5FY

And more generally, when you say "My Zotero is not responding at startup", what does that mean? What exactly happens when you start Zotero?

Hi Dstillman,

I've tried Zotero 5.0.45, 46, 47 on my own computer. However, none of them works on my computer. The startup error is the same for each version.

Not responding means the status of Zotero thread in task manager is "not responding", it occurs when I try to start Zotero.exe. It is running but I can't click any button on the Zotero GUI. And Zotero didn't respond to me when I try to click anywhere in the Zotero. The mouse cursor is a blue circle which means Zotero is still loading. You can check the image via this link https://imgur.com/a/uXLedXM.

-ZoteroDebug parameter refers Reporting Startup Error[https://www.zotero.org/support/reporting_problems#reporting_startup_errors] webpage. Because I can't access the Help menu, I need to start Zotero via the command line by command
"C:\Program Files (x86)\Zotero\zotero.exe" -ZoteroDebug
But it still doesn't work, no any debug dialog showed after excuting this command.
Following the instructions on the webpage, I replaced “-ZoteroDebug” with “-jsconsole”. Zotero opened with a separate Error Console window showing errors that have occurred. And the error information was posted as you saw.

Could not read 'file:///C:/Program%20Files%20(x86)/Zotero/extensions/zoteroOpenOfficeIntegration@zotero.org/components/zoteroIntegration.xpt'.

Zotero is running under administrator account for more than 15 minutes. It is still not responding and the CPU occupancy of Zotero is always around 18%. I can make sure it is not caused by the slow hardware issues. I just bought my computer last year. The setting is intel 7700HQ (4cores, 8threads), GTX 1060 GPU and 16GB DDR4 2400MHz RAM. I guess it is caused by some programming environments or incompatible office 16. Because I noticed that Zotero always opened up a dialog box showing Installing "Zotero Word for Windows Integration". I will reinstall the whole office 2016 and check whether Zotero works.

I've uninstalled Office 2016. And added the line

pref("extensions.zoteroWinWordIntegration.skipInstallation", true);

at the end of that js file. The Zotero is still not responding and still shows that dialog box.

I also tried to add the line

user_pref("extensions.zoteroWinWordIntegration.skipInstallation", true);

at the end of that js file. The dialog box disappeared, however, Zotero is still not responding. And the bug information is same.

Right, sorry, I meant user_pref.

So this is annoying, and I apologize for the hassle, but to get proper debug output here you can try installing Cygwin (just to your desktop is fine), running the Cygwin terminal (which is should create a shortcut for), and then running the same zotero.exe command with -ZoteroDebugText instead of -ZoteroDebug. That will hopefully log some lines to the terminal that say what's going on.

zotero(3)(+0000116): WinWordIntegration[install]: Looking for Word in HKCU

zotero(3)(+0000002): WinWordIntegration[install]: Word version 16 found

Hmm, that's with user_pref("extensions.zoteroWinWordIntegration.skipInstallation", true); still set in prefs.js? Make sure that line is only appearing once and is set to true with Zotero closed.

zotero(3)(+0000000): User interface ready in 1064 ms

I'm afraid that looks totally normal. Can you describe (or show) exactly what you're seeing on screen? Is the Zotero window appearing? If so, what's in it?

Zotero works now ^_^, After I reinstalled my operating system. Now it works

I have met the same issue, how fix it?

My gosh, I really don't want to reinstall my system, it's a huge project! What about just uninstall VM?

@xiaobaifighting I fix this problem after reinstalling the operating system

Dear Jamescock,

I reinstall win10 twice, both situations is that Zotero worked at the beginning but it didn't work after one day. And the bug information is same.

I also have the same problem and I can confirm that switching network off solves it. The same problem happens to a fresh install of zotero on 2nd machine