Does antivirus software slow down PCs?

[system]

@Rik Packham post:13

Ah, I see you are saying when Avast is scanning in whatever manner is has available.

The issues listed in my previous post are NOT occurring when Avast is scanning save its looking at the internet when accessing. This is what brings my system to a crawl. I do verify from time to time, especially when running into the problems when running Chrome, that Avast is NOT running any form of disk scan at the time.

Just a little FYI.

Have you tried running a full system scan to ensure that your system isn’t actually already infected? You can also use other malware scanners to check for the presence of malware that Avast! will miss. In certain situations, malware can interfere with normal computer operations, but not be caught by your antivirus program. In this situation, you can run other scanners (Like malwarebytes Anti-Malware) in order to search for, and remove the infections that Avast! missed.

If your system is not infected by malware, and you’re still having this issue, the next step is to write down the activation key you paid for, then completely uninstall Avast! Internet Security, redownload it fresh (after clearing your browser’s cache, and windows temp files), and try reinstalling it again. If this fails, I would personally request a refund, and switch products, as it may be some kind of incompatibility with your hardware, or software.