This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Update to version 26 error msg - Win7Pro

  • 2 replies
  • 2 have this problem
  • 1 view
  • Last reply by fitnessfan

more options

Received the prompt to update Firefox version 25 to Firefox version 26. Clicked on Update Now and successfully downloaded the update. When I attempted to run the update, I get the error message, "The version of this file is not compatible with the version of Windows you're running. Check your computer's system information to see whether you need an x86 (32-bit) or x64 (64-bit) version of the program, and then contact the software publisher." I have the 64-bit version of Windows 7 Pro. I tried performing the installation with all other applications closed. I tried the manual update. I tried updating from the About menu. None of it works. Has anyone solved this issue?

Received the prompt to update Firefox version 25 to Firefox version 26. Clicked on Update Now and successfully downloaded the update. When I attempted to run the update, I get the error message, "The version of this file is not compatible with the version of Windows you're running. Check your computer's system information to see whether you need an x86 (32-bit) or x64 (64-bit) version of the program, and then contact the software publisher." I have the 64-bit version of Windows 7 Pro. I tried performing the installation with all other applications closed. I tried the manual update. I tried updating from the About menu. None of it works. Has anyone solved this issue?

Chosen solution

Hello,

First unistall the other version Firefox:

After, Install Firefox:

If you dont get, please tell us!!!

Read this answer in context 👍 0

All Replies (2)

more options

Chosen Solution

Hello,

First unistall the other version Firefox:

After, Install Firefox:

If you dont get, please tell us!!!

more options

Thanks for the very quick response; it seemed that I had just pressed SEND when the reply appeared :-) Love that! This worked once I restarted the PC and downloaded the Firefox 26 Stub file.