BaapTera

Hi, see the changelog here: https://support.kaspersky.com/14375#block0 Usually its best to have the latest patches and ensure product is updated although from time to time as is the case with any software it may unintentionally impact performance or cause issues so a rollback to a previous version might be necessary.

I was experiencing a similar issue (not sure if its related) but I uninstalled KSC version 20.0.14.1085(E), cleared up temporary files and performed a registry clean with CCleaner, then reinstalled the latest version from the Kaspersky website. This time it installed KSC version 20.0.14.1085(C) and so far there are no slow downs or system lag. I haven’t changed anything else such as installing new software or drivers. (Since my system is running well I went into KSC Settings → Additional → Update, and under “New application versions” checked “Do not download new versions automatically...” The virus database will still update as usual. I will change the above setting when a new patch is released and test on my virtual machine first before updating on my main system. Regards.