Good morning! No apologies necessary. Thanks for letting me know about the prior issues before Kaspersky. I'll do some more research and get back with you or someone else might chime in. Thanks for your patience.
Let me know how the test came out. Also, reboot your router if you haven't already. Thanks.
Open an elevated command prompt - Hit start, type cmd, then Ctrl + Shift + Enter, this should open and elevated command prompt. Type in SFC /Scannow hit enter and let it finish. Let me know the outcome.