nazmunsadat

I used to be a former user of Kaspersky products. I am aware that this forum is probably no longer intended for me, but I still want to share my experience in the hopes it will be useful to everyone in this thread. Recently I switched to Bit Defender Free Antivirus. However, yesterday I found that something deleted Bit Defender, although the shortcuts in Start Menu, and the entries in Apps in settings were still there. Opening the shortcut location, I found almost the entire content of Bit Defender's install directory is empty. At first I thought this was a faulty update. However, just to make sure, I opened Windows Security just to check why it didn't notify me that something was wrong. To my utter surprise, Windows Security was blank and none of its functions are working properly. It also told me that my Windows FireWall settings were not safe, but wouldn't let me fix it from the app itself. I also noticed that I couldn't update my Windows 10, it gave me a error (0x80070002). By this time I was fairly certain that my PC was infected, so I installed Avast Free Antivirus. Avast then detected the following: winscomrssrv.dll,C:\Windows\System32 Win64:Trojan-gen winrmsrv.dll,C:\Windows\System32 Win64:Trojan-gen wslogony82.dat,C:\Windows\System32, Win32:Miner-DM [Trj] pagefile.sys, G:, Win64:Trojan-gen After this, a scan by Malwarebytes gave these results: Registry changes: PUM.Optional.DisabledSecurityCenter Trojan.Agent, file, System32\Tasks\Microsoft\Windows\Application Experience\STARTUPCHECKLIBRARY Trojan.Agent, file, System32\Tasks\Microsoft\Windows\Wininet\Winlogui Trojan.FakeMS.TskLnk, file, C:\Windows\System32\STARTUPCHECKLIBRARY. DLL And a ton of registry changes. These files were quarantined, and registry changes fixed by Malwarebytes. Subsequent scans by Malwarebytes and Avast (including one boot scan) found no viruses so it seems my PC is safe for the time being. But my Windows Updates and Windows Defender were both non-functional even after the removal of the viruses above. Eventually I managed to fix Updates by following the instructions from this link: shorturl.at/fgij2 But Windows Defender still isn't working and that's where I am at right now. Hope this helps.