Combined with always-on, real-time protection, which reviews files when they are opened and closed, and whenever a user navigates to a folder, a quick scan helps provide strong protection against malware that starts with the system and kernel-level malware. In most cases, a quick scan is sufficient and is the recommended option for scheduled scans. A full scan can take a few hours or days to complete, depending on the amount and type of data that needs to be scanned.
When the full scan is complete, new security intelligence is available, and a new scan is then required to make sure that no other threats are detected with the new security intelligence. Because of the time and resources involved in a full scan, in general, Microsoft does not recommend scheduling full scans.
A custom scan is a quick scan that runs on the files and folders you specify. For example, you can opt to scan a USB drive, or a specific folder on your device's local drive. A quick scan checks the processes, memory, profiles, and certain locations on the device. Combined with always-on real-time protection , a quick scan helps provide strong coverage both for malware that starts with the system and kernel-level malware.
Real-time protection reviews files when they are opened and closed, and whenever a user navigates to a folder. Threats, such as malware, are detected on an individual device Quick scan In most cases, a quick scan will catch and clean up detected malware.
You want to run an on-demand scan Quick scan You want to make sure a portable device, such as a USB drive, does not contain malware Custom scan A custom scan enables you to select specific locations, folders, or files, and runs a quick scan.
What else do I need to know about quick and full scans? Malicious files can be stored in locations that are not included in a quick scan. However, always-on real-time protection reviews all files that are opened and closed, and any files that are in folders that are accessed by a user. Did you upgrade to the "anniversary" Win 10, ver. The main reason a quick scan can take a long time is the number of files it must scan. What is the count for you during one of those long scans?
That took less than 2 minutes to complete. But I've had 5 minute scans as well, when - for some reason - Defender finds more files to scan - maybe , files. It is quicker run offline, but does require a reboot.
Details required : characters remaining Cancel Submit. Thanks for your reply, at least for the moment I've given up on the built in windows defender, I'm currently trying out avast free anti virus. I used Avast! But Defender is so well integrated into Windows that I'll never switch away.
I've got a few peeves with it, but I'll never switch away. There may be a folder left behind that you should delete. Do the BING. There may be a version of that is itself a virus - but I decided you didn't have that one since you can uninstall it. How many files did Defender count during a 20 minute Quick scan?
That may be something to look into. Once again, thanks for a reply.. At least on my system.. So when the 'quick scan' reached as I remember 38 minute's and counting, I decided that was enough and I switched. I don't know if you ever check out 'real world' testing of anti-virus product's of not.. Here are some site's:. I think the more information that a consumer can be provided with, the more rational a decision can then be made. I really like that it can easily be run offline now.
And it passes all the tests at, catching them on the way in Hi, I had been using a third party free anti-virus which seemed to perform well, I've noticed that Microsoft has seemingly made some improvements to their product. This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. I have the same question Report abuse. Details required :.
Cancel Submit. Previous Next. Sometimes computers can get infected with malware that is difficult to remove. You will need to boot an antivirus in a safe environment before the operating system is loaded. Use the Offline method if your browser was hijacked or a threat has compromised your Internet connection. If there is already an exclusion, you can delete it by clicking Remove an exclusion. Click on Triggers and then New to open a new trigger. The options available to customize are:. For the Daily option, you will be prompted to select the start date and time.
If you want to Synchronize across all time zones , tick off the box. Use these Advanced settings to customize exactly when and under what circumstances your scans run. Click OK to save your settings. The new task will now show up under Trigger. You can edit or delete it any time. If you find that scans slow down your computer while working, set them to run at night when you are not. The results are recorded when you run a Windows Defender scan.
To view them, open the Windows Security app by searching for Defender from the Start menu. Windows Defender scans your device regularly to keep it safe from malicious threats with its real-time protection. As explained above, users can also choose to run on-demand scans and customize a schedule based on the time and frequency that works best for them. David has a background in small business and lives in Australia.
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