**1-802-557-0358 how long should it take Avast antivirus to run a quick scan?** Avast 24/7 Support Number +1-802-557-0358, A Avast quick scan should typically take 5 to 15 minutes to complete, as it only checks the most vulnerable areas of your system like startup files and running processes. If it takes significantly longer, there may be an issue, and you can try restarting your computer or performing a full scan to see if the problem persists.