Well that form can be used for technical support there is nothing on there to suggest it is for paid versions.
If you go to this link https://support.avast.com/support/tickets/new, that shows an option for Technical Support and that is the direct link that I gave you.
What is the problem with Excel 2003 ?
Whilst I use XP Pro SP3 I have an ancient version of excel (Office 97) and no issue with that.
I'll try to explain my problem a little more simply.
I have a network of 4 computers; 2 XP SP3 PC's and 2 Win10 1607 PC's.
Software causing problems: MS Office 2003 SP3.
All PC's have AVAST Free V17 installed.
I have an Excel file stored on Win10 PC.
I access this file through the network on an XP PC, the file opens okay with no errors.
I make changes to the Excel file and try to save. I get the errors shown above in my previous post and the file becomes "locked". I am unable to access the file from any other PC on the network. The XP PC I originally accessed the file has to be rebooted to enable access to Excel file from any PC on the network.
If I disable AVAST File System Shield on the XP PC before I open the Excel file on XP PC, I make my changes and save the file, I get no errors and the file saves.
If I access the Excel file on Win10 PC which the file is stored on or on another Win10 PC on the network I get no errors even if AVAST File System Shield is enabled. It seems the problem lies with XP AVAST File System Shield.
None of this was a problem when AVAST V12 was installed.