Definitely not a fix for the average user. 
I think an average user should be able to copy & paste text into an emtpy textfile and rename the .txt textfile to .reg and double click it.
One only needs to tell them to do so.
AVAST and AutoCAD 2011 at Windos XP this solution does not work. Is there a key in the registry for Windows XP?
Try to search and delete {472083B0-C522-11CF-8763-00608CC02F24} in regedit.
Hi, everybody,
I am not an Avast expert, but I have been an AutoCAD user for many years. I just would like to suggest to the AutoCAD users in this thread to upgrade their AutoCAD versions. I just would like to suggest you to consider that maybe those old versions of AutoCAD are the reasons of your inconveniences, and not Avast.
I have been both an Avast user and an AutoCAD user for many years. Currently I am using AutoCAD 2017, and I have never seen a conflict between AutoCAD and Avast.
Instead of tweaking Avast or the Windows Registry, I strongly suggest you to upgrade your AutoCAD version. Sorry, I am not a computer expert and I can’t give you a better advice! Hope this may help.
Greetings!
I have the same problem between Autocad and the Avast version 17.1.2286 (windows 7). The actual problem is that I can’t open a new file with Autocad because the program due to Avast malefactions. I have tried all the other free antivirus programs and I don’t have this problem but I prefer Avast because I use it for many years and I know that it is a trusted antivirus although it’s free. Does anyone have the solution? I have already tried the solution with the registry file that someone wrote above but it is not working!
At work I can’t just go to my boss and tell him to upgrade ACAD for a few thousands euro only because the Antivirus system messes things up with the latest major version.
How to me have written here https://forum.avast.com/?topic=199271.msg1380048#msg1380048 try disabling the ‘Avast Shell Extension’ through this program http://www.nirsoft.net/utils/shexview.html
Write the result here
Avast is built into the context menu of Windows Explorer and there is a conflict when AutoCAD calls Windows Explorer
Developers Avast in the course and are looking for a solution
Let’s hope in new updates Avast will fix
Worked for me in XP SP3.
Now even allows Import & Export to function properly.
Can I expect that the next Avast program update will break it again?
Thanks
If developers will test Avast qualitatively before publishing updates, then there will be less problems
Before 1-2 years there were no problems
Perhaps a lot of new code has been done and until it is broken and some bugs will be set up
Time will tell
Program v17.3.2290 (build 17.3.3442.0) has not fixed the problem.
Disabling shell extensions still necessary.
So sad!
Contact support: https://support.avast.com/support/tickets/new
Came back here tonight to see if Avast have found a solution to this Problem … seems Not !
I’m using my laptop without ant antivirus software …
This is not the first time that Avast have stopped AutoCAD from working on my Laptop.
https://forum.avast.com/index.php?topic=111246.0
December 13, 2012,
I spoke to a Avast Avast Customer Care member on Facebook - Still no joy !
updating AutoCAD is not a solution for me … How much is a current version of Autocad ??
I had this problem with two diferent computers at same time. I figured the problem could be related to some automatic update (windows or avast). I also noticed problems saving plot settings and other settings. That way I considered Avast to be blocking Autocad access to configuration files. These files are in the user folder. So I include this folder in the exclusion list of Avast. After doing this Autocad started working properly.
You could try the latest beta: https://forum.avast.com/index.php?board=15
Latest release 17.4.2294 (build 17.4.3482.0) has fixed this problem for me with XP SP3.
Avast has been notified through various methods. Please be patient. 