Kaspersky Installation Disabled All USB Input Devices – Cannot Log In to Windows

[hega333]

After installing Kaspersky, all USB input devices (keyboard & mouse) stopped working immediately after booting into Windows. Windows itself boots fine, but since no input devices work, I cannot log in.  

The issue started after attempting to install Kaspersky. During installation, it gave a message stating that Avira was still installed, even though it had been removed two years ago. I manually checked the registry and deleted two Avira-related entries, but one entry could not be removed. I continued with the Kaspersky installation anyway, and then both of my monitors went gray, and several DLL errors appeared.  

After restarting the PC, USB devices stopped working completely in Windows, even though they still work in BIOS and in the Windows Recovery menu.  

Steps Already Attempted (None Worked):  

1. BIOS & Hardware Checks:  
- Keyboard and mouse work in BIOS, so this is not a hardware issue.  
- Legacy USB Support is already enabled in BIOS, so USB ports are not blocked at the motherboard level.  
- Tried multiple USB ports (front, back, USB 2.0, USB 3.0), but none work in Windows.  
- No PS/2 ports available, so that option is ruled out.  

2. Windows Recovery & Safe Mode Attempts:  
- Booted into Advanced Startup (Recovery Mode), and USB devices work there.  
- Booted into Safe Mode (F4), but USB devices do not work.  
- Booted into Safe Mode with Networking (F5), but USB devices do not work.  
- Booted into Safe Mode with Command Prompt (F6), but USB devices do not work.  
- Attempted “Startup Repair” in Recovery Mode, but it did nothing.  
- Tried “Reset This PC” with “Keep My Files,” but it failed with the error “Could not reset this PC, no changes were made.”  

3. Kaspersky Removal Attempts (Failed Due to No Input):  
- Tried opening Command Prompt in Safe Mode to uninstall Kaspersky, but no input devices work, so I couldn’t type commands.  
- Manually checked Kaspersky’s installation folders using Command Prompt in Recovery Mode:  
  - C:\Program Files\Kaspersky Lab does not exist.  
  - C:\ProgramData\Kaspersky Lab does not exist.  
- Manually checked Windows registry for Kaspersky-related services (klflt, klkbdflt, klmouflt, avp, etc.), but none were found.  

4. USB Driver Repair Attempts (Did Not Work):  
- Tried enabling USB drivers manually via Registry in Command Prompt:  
  reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBHUB3" /v Start /t REG_DWORD /d 3 /f  
  reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\usbhub" /v Start /t REG_DWORD /d 3 /f  
  reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\usbxhci" /v Start /t REG_DWORD /d 3 /f  
  reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\usbehci" /v Start /t REG_DWORD /d 3 /f  
  reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR" /v Start /t REG_DWORD /d 3 /f  
  None of these commands fixed the issue.  
- Tried forcing USB driver reinstallation using DISM & pnputil in Command Prompt, but it did nothing.  
- Checked disk partitions (diskpart) to confirm Windows installation drive was correct, but there was confusion with the drive letters (C: and X: were mismatched).  

 

Current Situation:  
- Windows still boots fine, but I cannot log in because keyboard and mouse do not work.  
- Recovery Mode recognizes USB, but Safe Mode and normal Windows do not.  
- Kaspersky is not listed in Program Files, ProgramData, or the registry, but the issue clearly started right after installing Kaspersky.  
- Resetting Windows fails, so I cannot even attempt a repair install from inside Windows.  

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What I Need from Support:  
- How to fully remove Kaspersky (including any hidden services) without being able to log in.  
- How to manually enable USB drivers from Recovery Mode.  
- How to fix the "Reset This PC" failure in case a repair install is required.

[harlan4096]

Welcome to Kaspersky Community.

 

Please provide versions of operating system and K. product installed.

 

Did You try this?

 

https://support.kaspersky.com/krd18/tools/14221

[hega333]

Hi, thanks for the warm welcome!

I did not, as I'd heard through a friend that it could cause further issue, but I ended up resolving the problem through a stroke of luck. One of the first things I tried––which I didn't mention above, was trying to remote into my PC with tailscale and TeamViewer, which didn't work. Well as I was about to give up, TeamViewer booted up and I was able to remote in with my Mac. From here, I immediately enabled the "broken" USB devices in device manager, all of whom had little warning signs (⚠️) next to them. 

M&Kb worked from then on. 

 

Thanks for the suggestion, though.