Failure to complete the computer scan

Sidney,
We understand your concern, mostly this issue will occur only when AVG doesn't have latest virus definitions. In this case, we request you to uninstall http://support.avg.com/SupportArticleView?urlname=How-to-uninstall-AVG-AntiVirus-for-Mac and reinstall http://support.avg.com/SupportArticleView?urlname=How-to-download-and-install-AVG-AntiVirus-for-Mac your AVG to check with it. We are here if you need any further assistance.

Sidney,
We understand your concern, mostly this issue will occur only when AVG doesn't have latest virus definitions. In this case, we request you to uninstall http://support.avg.com/SupportArticleView?urlname=How-to-uninstall-AVG-AntiVirus-for-Mac and reinstall http://support.avg.com/SupportArticleView?urlname=How-to-download-and-install-AVG-AntiVirus-for-Mac your AVG to check with it. We are here if you need any further assistance.

I bought an iMac computer yesterday and also bought the AVG anti-virus and AVG cleaner package for Mac.  I installed it yesterday, was told that the installation was complete and ran a computer scan.  The scan completed without finding any problem.  However, when I ran a computer scan about an hour ago it ran up to around 98% with no indicated problem, then closed without finishing.  The iMac stated that the AVG AntiVirus program closed unexpectedly.  I told it to run again.  Same results.  I ran it a third time, same results.  I need help in determining what is happening so it can be fixed.