Avast 2016 erases text in MozTbird outgoing e-mails

[REDACTED]

Using Mozilla Thunderbird (current version is 38.5.1 and my OS is XP Pro).

Often, upon clicking "Send," I get an error message: "Problem including file file:///C:/docume~1/(my name)/locals~1/temp/nsemail.html. Would you like to continue sending the message without this file?" If I click on "OK," sometimes it goes through OK and sometimes it goes through with the message text deleted.

Remedy suggestions appreciated.

[Asyn]

- Which Avast..? (Free/Pro/IS/Premier)
- Which version..?
- XP... (32/64 Bit..? - which SP/Build..?)
- Other security related software installed..?

[REDACTED]

Avast free version; XP Pro SP3 (not sure whether 32 or 64); also have Superantispyware, and Windows firewall is ON.

[Eddy]

Empty that temp folder and see if things have changed.
Make sure all files are removed.

[DavidR]

Avast free version; XP Pro SP3 (not sure whether 32 or 64); also have Superantispyware, and Windows firewall is ON.

If you have XP Pro SP3 then it is a 32bit version - I believe the only XP Pro version that had a 64bit version was SP2 -  the 64bit version only went to SP2, no SP3 release. By default then, if you have XP Pro SP3 it is 32 bit.

[Eddy]

Stop believing David. 
There is indeed no SP3 for the 64 bit version of XP.

[DavidR]

Stop believing David. 
There is indeed no SP3 for the 64 bit version of XP.

I never had the XP Pro 64bit version, so I was relying on memory and you know how memory can play tricks on us

[Asyn]

Avast free version;

Which version of Avast Free..??

[REDACTED]

Eddy, thanks for your suggestion. I followed it and, unfortunately, it hasn't eliminated the problem.

[Asyn]

First, be sure to get rid of all remnants of your prior installed AV(s)..!!
-> https://www.avast.com/faq.php?article=AVKB11#artTitle

Then:
1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_setup.exe
2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions..!!)
3. Reinstall Avast with the downloaded installer from point 1.
4. Reboot.