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Microsoft Security Essentials on-demand scan

How to run a full virus scan or scan just one file or folder with Microsoft Security Essentials in Windows XP, Vista and 7

By . Last modified: 2014-04-09.

Attention, Windows XP users: Microsoft will stop providing malware definition updates for you after July 14, 2015. Because outdated definitions cannot provide adequate protection, see avast! Free Antivirus instructions instead.

If you need to check only one folder or file, right-click it and select Scan with Microsoft Security Essentials from the menu.
To scan only one file or folder, right-click it and then select 'Scan with Microsoft Security Essentials'.

If nothing is found, Microsoft Security Essentials window opens with green status. You can then close the window.

In case something malicious is detected, Microsoft Security Essentials window opens with red or yellow-orange status (depending on alert level) and a large Clean PC button. If you've configured MSE to apply automatic actions, the cleaning process might have already started.
If some virus or malware is found during scan, Microsoft Security Essentials window opens with red or yellow status. Click Clean PC.

After cleaning is complete, Microsoft Security Essentials turns its status to green (unless you're running Windows XP: status and the icon in System Tray always remain red to remind you about the end of support for the old OS).
Click Close and then close main program window. In some cases, a restart is required to remove a bit nastier malware.
After Microsoft Security Essentials finishes cleaning, its status turns green. Click Close.

Running a monthly full anti-virus scan with Microsoft Security Essentials

A full scan should be performed once every month to ensure that there are no viruses and malware hiding somewhere deep in your computer. You should also run a full virus scan when status of Microsoft Security Essentials remains red after a quick scan.

Open Microsoft Security Essentials by clicking on its fortress icon in Taskbar Notification Area/System Tray. You can also right-click the icon, that makes no difference. Then click Open.
Windows 7, open Microsoft Security Essentials by clicking its icon in Taskbar Notification Area. Click Open.

Microsoft Security Essentials main window opens. Make sure Home tab is open. In the right part of the window click Full under Scan Options. Then click Scan now.
To perform a full scan with Microsoft Security Essentials, click 'Full' under 'Scan options'. Then click Scan now.

Wait until the scan is complete (this might take several hours). Well, you can do some work if you have a fast computer, or you can call your friends or do some exercise... Smile

If everything's fine, you can safely close MSE window.

If something malicious has been detected, Microsoft Security Essentials will turn its status to red or yellow-orange and present a big button named Clean PC after the scan is complete. Click that button. If you've configured MSE to apply automatic actions, the cleaning process might have already started.
If some virus or malware is found during scan, Microsoft Security Essentials window opens with red or yellow status. Click Clean PC.

Microsoft Security Essentials will then quarantine or delete the item and present a success message. Click Close. In some cases, a restart is required to remove all traces of malicious software.
After Microsoft Security Essentials finishes cleaning, its status turns green. Click Close.

If the same malware still reappears, use RKill for detecting and stopping active malware services and processes (the scan takes only about 5 minutes!). Then use Malwarebytes Anti-Malware or ComboFix to get rid of the infection.

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