I use Windows 7 Pro, and usually Chrome, but as I say I've tried this in other browsers. ![]() When I reinstalled, Avast couldn't even update its own databse online or register me!!! It couldn't even get online itself, let alone anything else. I have followed advice to completely uninstall and reinstall the latest version, but nothing changed. It doesn't matter which broswer I use, I get total blocking on all of them, I can't access any website.Īs soon as I turn off the Avast Web shield, I get instant access to websites, so I know it's Avast. The entire thing can be avoided by only allowing one scanner to run on-access scanning while any others will be on-demand only.I've been a happy user of Avast and have recommended it to many others but this past week I've been very disappointed and annoyed at the total web block that's going on. Big deadlock situation that will cause some scanners to completely block access to files, including system files required to allow the system to continue to run. ![]() Another more devastating (performance-wise) possibility is when one of the scanners access the file for scanning, the other scanner sees this and decides it needs to scan the file first which triggers the first scanner seeing this new access and sees that it hasn't completed its scan of the file, so it wants to deny access to the second scanner until its scan is completed. The situation arises that the system access a file, both scanners see this and both compete for access to the file to scan it. The on-access scanners are the ones that will cause the problems. ![]() The big issue has to do with if they are on-demand scanners or if they are on-access scanners. The issue in general is not a simple matter of a simple number of installed antivirus or antimalware programs installed, but in how they operate.
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