Microsoft Security Essentials is a free security product by Microsoft for Windows XP, Vista and Windows 7. While that is a good thing, it is also one of the weaker programs in terms of protection.
Still, it appears to be a highly popular choice for users of those systems, likely because it is produced by Microsoft, and because it is easy to use.
Our suggestion would be to switch to another product, like Avira Antivirus, which is also available as a free version.
If you are using Microsoft Security Essentials and noticing that it impacts your PC's performance, especially during scans, then you may be interested in the following tip to reduce the load that the software has on your system.
Here is what you need to do to achieve that:
Side-tip: If you want scans to complete faster, remove the "limit cpu usage during scan" check-mark to achieve that.
The second thing that you can do is change the process priority of the msseces.exe process in Windows. Tap on Ctrl-Shift-Esc to open the Task Manager, switch to processes, and find the process listed here.
Right-click on it and select Priority > Below Normal or Low instead. Note that this is only valid for the current session.
If you want the change to be permanent, download a free program like Prio for that. You can use Prio to set the process priority of any process to another value, and have it retain that new value even between sessions.
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Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.