Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

I keep getting Update XML file malformed 200 on windows 7, I reinstalled to new version of firefox 3.6.4 and it still does the same thing. Help

  • 1 reply
  • 9 have this problem
  • 10 views
  • Last reply by rjohnson19

AnonymousUser
AnonymousUser
more options

I keep getting malformed Update XML 200. Upgraded to 3.6.4 manually and I am still getting the error. I have windows 7. What does this mean and how can I fix it?

This happened

Every time Firefox opened

== not sure

I keep getting malformed Update XML 200. Upgraded to 3.6.4 manually and I am still getting the error. I have windows 7. What does this mean and how can I fix it? == This happened == Every time Firefox opened == not sure

All Replies (1)

rjohnson19
rjohnson19
more options

See http://kb.mozillazine.org/Software_Update#AUS_Update_XML_File_Malformed_200 (Software Update not working properly) and AUS Update XML File Malformed 200

After closing Firefox, Remove the files in the updates and updates\0 folder:

C:\Program Files\Mozilla Firefox\updates\ (or possibly C:\Program Files (x86)\Mozilla Firefox\updates\)

C:\Users\<user>\AppData\Local\Mozilla\Firefox\Mozilla Firefox\updates


(Replacing <user> with your user name.)