Michael,
I regret for the inconvenience caused. But the 'UI failed to load' issue with AVG Free Antivirus issue hasn't been fixed and we need the logs to fix it.
Please follow below instructions to collect diagnostic logs regarding the issue:
1. Please download the AVG SysInfo tool using this link www.avg.com/filedir/util/AVG_SysInfo.exe .
2. Run the downloaded tool.
3. Click Continue to agree with AVG’s license agreement and privacy policy. AVG SysInfo will now gather the necessary data.
4. Once the diagnostic output is ready, you may Attach file or Screenshot to provide us with additional information.
5. Fill in your email address
6. Fill in the case number as 04544018.
7. Click send output.
Then the logs will reach the senior team.
Thank you.
Sorry, but alla circumvention proposed for AVG problem UI FAILED TO WORK, don't work!
I solved, in my XP sp3 pro, uninstalling the last version with Windows Add/Remove Prograns, then for more care manually deleting all AVG* found in C: volume, then reboting and finally installimg one of PREVIOUS free version found on WEB, exactly the 2016.131.7924, from the site:
Scaricare AVG AntiVirus Free 24.12.9694 per Windows | Uptodown.com
Note: the downloaded file, 320 MB, doesn't require Internet Connection during installation, suggested execution off line. This version work nice on my PC, and i judge thet as sconsider the your better/faster edition.
Bye.
Hello Michael,
We apologize for the inconvenience caused. We request you to try repairing the "AVG Protection" by following the instructions below:
1. Go to Start -> Control Panel.
Note: Click Settings first if Control Panel is not available in the Start menu.
2. Open (Programs) -> Programs and Features, or Add or Remove Programs.
3. Select AVG Protection in the list of programs.
4. Click the Change or Change/Remove button.
5. Select Repair.
6. Follow the instructions on your screen to complete the installation.
7. Restart your computer.
Please follow the instructions below and contact us for further help.
Thank you.
Michael,
We are afraid to lose a valuable customer like you. So please try to remove the AVG Traces completely using the below steps and check if the issue still persists:
1 Use the link https://share.avg.com/steam/PSP/AVG2017/AVG_Clear.exe to run the AVG Clear tool.
2 Open the AVG Clear tool, click Yes in the User Account control dialog.
3 Click No in the Windows safe mode dialog.
4 Select the installed version of AVG and also check the box 'Uninstall AVG Zen'. Then click Uninstall, and Restart computer.
5 Download the AVG remover tool please click on this link: http://aa-download.avg.com/filedir/util/AVG_Remover.exe .
6 Run the downloaded tool and follow the instructions displayed on your screen and restart your PC if prompted.
After reboot, Open C drive and delete "AVG Remover" folder, also delete "AVG" folder in "Program files (x86)" in C Drive.
Use the link to install AVG free Anti virus: http://files-download.avg.com/inst/mp/Antivirus_Free_1817.exe .
Thank you.
Thanks for your belated attention to the matter. Seems like you'll help many people by getting to the bottom of this issue. I have run the diagnostics and sent the log using the diagnostic utility, I also saved a copy. The process appeared to complete, but during the collection of the data the following errors were generated…
11:05:31 AM: Could not set current working directory (error 2: the system cannot find the file specified.)
11:05:31 AM: Could not set current working directory (error 2: the system cannot find the file specified.)
11:05:31 AM: Could not set current working directory (error 2: the system cannot find the file specified.)
11:05:36 AM: Could not set current working directory (error 2: the system cannot find the file specified.)
I was advised to expect a confirmation via e-mail and an incident number, but these were not received. I anxiously await your earliest advice.
I can see from the traffic this is a problem with AVG. AVG needs to push a patch to correct this issue everyone is having. Uninstall and reinstall is an entry level response not the fix
I have tried following the steps, and I still get 'UI failed to load.' I also noticed a couple of processes that may be related: avgdiagex.exe & 2 occurences of instup.exe
Hello Wayne,
I understand this must be upsetting. On checking the previous case, I see that you have got connected with our remote technician since the issue is not fixed, they have escalated the case to our senior technicians. Our senior technicians have sent you an email on July 13, 2017 at 5:37 AM. Please follow the email instructions and get in touch with them to fix the issue.
Note: Case Number 04959810
Thank you Abirami but… I already had your team take over my PC and they said everything was fine, but the problem is still there.
The only solution I found was to download last years version ( avg-free-2016-131-7924-32-bit ) after totaly wiping out the new one. This works fine for a few days untill you "very kindly " UPDATE it and then the UI problem returns and I am again disconnected from the web. There is a section that I can uncheck automatic updated but it wont let me save that option and just goes ahead anyway!!??
So, if you could just PLEASE STOP the auto updates I would be fine.
Hi Garret,
We apologize for the inconvenience caused, could you provide us a Screenshot http://avgclick.me/getscreenshot of the AVG User Interface.
Thank you!
SOLVED!!!
John Smith
KUDOS TO KEN EDMONDS :-)
THANK YOU KEN!
I performed ALL of the steps AVG had suggested to no avail. I actually thought that a SERVICE or PROGRAM may have been the problem so I DISABLED a lot of SERVICES and removed a lot of PROGRAMS. Still not working. After seeing your resolution TODAY I set Terminal Services (which is one of the ones I disabled as a last resort to get AVG working) to start AUTOMATICALLY and though I had a problem STARTING it I eventually was able to (SEE BELOW) and BAMM AVG started working as designed! 
SO TERMINAL SERVICE SERVICE IS THE KEY. Set it to automatic and start her up to resolve this ugly mess.
Under SERVICES in XP Administrative Tools RIGHT CLICK on Terminal Service and select PROPERTIES. Once in properties select the Startup Type - AUTOMATIC. THEN CLICK ON THE LOG ON tab and ensure that the HARDWARE PROFILE for your system is enabled. If not, enable it (touch nothing else here). NEXT go back to the GENERAL tab and START the service in the Service Status area. This should START and set Terminal Services to AUTOMATIC on system boot. Now that it is Started you can exit Administrative Tools and try AVG - I think you'll be happy
How can this problem be resolved on Windows 7?
I am also anxiously watching this thread as I have the same exact problem … same version of XP. I have followed all the recommendations at least twice and still get the UI Failed to Load window. So, as of now I have AVG completely uninstalled and waiting to see what the next recommended steps are to correct or being advised that a revised software version is available that corrects this problem. Thank you.
I am having the same problem on Windows 10.
Every time I try to scan the computer the message "UI Failed to load" appears.
What happens? I paid for this antivirus. 
My windows have already been updated so I believe that the problem is not the windows.
Hello Art,
We request you to run diagnostic tool which will collect the diagnostic information and analyze this issue.
We will get back to you after analyzing the logfiles.
Thank you.
I am having the same problem on Windows 10. It started recently, I think a few days ago.
Hi Art,
We are really sorry to hear that. Could you provide us the case number to assist you further regarding your issue?
Thank you!
Hello Garth,
We appreciate your patience. To analyze this issue, we need the log files of AVG.
We have sent the email instructions to collect and send us the log files.
We have sent the email instructions on how to collect and send the log files to us.
Please check for the email on spam and junk folders if it is not present in the inbox.
Been having the same problem for about 3 weeks now.
Only happens after the PCs been running for a few hours and restarting the service (AVGSvc.exe) always brings the UI back up but then, sometime within the next few hours, it'll fail again (i.e. AVGSvc.exe stops for no apparent reason.)
I've tired ALL the numerous suggestions listed in this and other threads (including those by Ty Askash) and none of them have fixed the problem. Also, because the "symptoms" could be indicative of possible virus/malware activity (i.e. "something" keeps shutting AVG down), I also scanned for such nasties using alternate products with nothing found.
As others have noted, if I install an older version of AVG, the problem goes away until that version gets automatically updated to the lastest one.
Obviously there's some sort of bug in the newest version of AVG that needs to be corrected ASAP as having your Antivirus program randomly stop working is NOT a good thing!!
I expect that you will learn about the problem with your update from the many log files you have or already have received. Until you come up with a fix, I'm uninstalling AVG and installing Zone Alarms. I prefer AVG ( and have for a long tim). There is no question when the program automatically updated teh program, there was an error message of some wort about the installation. I hope you will contact your customers once you fix the bug that is causing these UI Error messages and the required restart of the UI. Thanks.