We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

Lockups

  • 3 replies
  • 1 has this problem
  • 8 views
  • Last reply by christ1

more options

Since the last update, when typing an en ail ... the To: window and Message window are fine, but when placing the cursor in "Subject, the program locks up and presents "not responding" message. Takes 7, 8. 9 tries to get a e-mail out successfully after closing and restarting the program.

Since the last update, when typing an en ail ... the To: window and Message window are fine, but when placing the cursor in "Subject, the program locks up and presents "not responding" message. Takes 7, 8. 9 tries to get a e-mail out successfully after closing and restarting the program.

All Replies (3)

more options

What is your anti-virus software?

more options

AV is Kaspersky, but:

1. I has never affected Firefox / Thunderbird before

2. The problem occurs regardless of whether AV loads. I have disabled Kasperky, rebooted, checked AV status (disabled) and problem still occurs.

more options

Try to start Windows 10 in safe mode with networking enabled. Win8 start Windows in safe mode Win7 start Windows in safe mode

Still in Windows safe mode, start Thunderbird in safe mode. Does the problem go away?

Modified by christ1