Hi,
I had the same problems with Canon software and it has been solved in all but one case by creating exceptions in AVG.
I still have a problem with Canon MapUtility though. I created an exception for maputility.exe but it will still not start up when AVG is running. If I shut down AVG, the application runs. If I shut down the various components of AVG one at a time, it still will not run.
I'm running a trial version of AVG Pro on Windows 10.
I also have this problem. Latest update prevents Canon EOS Utility from running.
I am also having the exact same problem since the latest update. I tryed uninstalling AVG free and rebooting then reinstalling and rebooting but nothing has changed. I did the same with EOS Utility, uninstall reboot, reinstall reboot.
Nothing works. All was well untill the latest update. I use EOS utility constantly if there is no solution I will have to look elseware for my virus protection.
George, You are welcome. I am happy that your issue got resolved. Please get back to us if you face any issue regarding AVG. Thank you.
Hello George. Sorry for the inconvenience caused. I would request you to uninstall and reinstall the AVG Free antivirus program once and if the issue persists please do let us know.
Thank you Hariharkuma! That fixed the problem. I didn't realize that I could add the files to the exception list! Probably should have tried to figure that out myself earlier! 
Thank you Hariharkuma! That fixed the problem. I didn't realize that I could add the files to the exception list! Probably should have tried to figure that out myself earlier!
Today I received an update for AVG Free. I rebooted my PC as instructed, and now two, that I am aware of, programs won't run anymore. I double-click on them and they don't run. When I disable AVG, then run fine. I scanned the folder where they reside and no problems. The two programs are Canon EOS Utility and Canon Picture Style Editor. I don't see any info saying that they were blocked or anything. They just don't execute when AVG is active. My version of AVG is 2015.0.6081, DB version is 4365/10147(Thursday,July 2, 2015, 2:20 PM). I'd appreciate any suggestions.Thank you!!
Hello George. Sorry for the inconvenience caused. I would request you to uninstall and reinstall the AVG Free antivirus program once and if the issue persists please do let us know.
I also have this problem. Latest update prevents Canon EOS Utility from running.
I am also having the exact same problem since the latest update. I tryed uninstalling AVG free and rebooting then reinstalling and rebooting but nothing has changed. I did the same with EOS Utility, uninstall reboot, reinstall reboot.
Nothing works. All was well untill the latest update. I use EOS utility constantly if there is no solution I will have to look elseware for my virus protection.
Hi George and Warren, could you please try to disable AVG and then reinstall the programs which have been blocked by AVG, after you reinstall those programs, add them to AVG exception list and check if that works, follow the below articles to know how to disable AVG and how to add files and folders to AVG exception lists.
Disable AVG http://avgread.me/1CFcSMG
How to Add files and folders to AVG exception list http://avgread.me/1cV4GkN
PS… I loaded the latest version of Canon Utilities from the Canon web site.
Hello George,
I apologize for the inconvenience caused. Please follow these steps to send us diagnostic information from your computer. This information will allow us to analyze the situation and provide you with solution:
Click this link http://www.avg.com/filedir/util/AVG_SysInfo.exe to download the AVG SysInfo tool.
Run the downloaded tool.
Click Accept to confirm the license agreement, and then click Continue.
Once the screen Output created is shown, fill in any additional details, or click Attach if you want to attach any additional files, such as screenshots.
Click Send, fill in your email address, and then click Send again.
We will analyze the received files and provide you with further information.
Thank you.
George, You are welcome. I am happy that your issue got resolved. Please get back to us if you face any issue regarding AVG. Thank you.