Kaspersky Error 27300 Klif.sys-x64 🆒

Kaspersky Error 27300 occurs when the installer fails to install the driver

. This is usually caused by leftover files from previous installations or conflicts with network filter drivers from third-party software like VMware, Cisco AnyConnect, or WinPcap. 🛠️ Step 1: Clean Up Previous Installations

The most common cause is "residue" from a past antivirus version. Download the official kavremover tool Kaspersky Support Run the tool as an Administrator

Select the product you previously had (or let it auto-detect). your computer immediately after the tool finishes. 🌐 Step 2: Fix Network Driver Conflicts This error often triggers if the NDIS filter is overloaded or corrupted by other software. Reinstall VPNs/Virtualization: If you use Cisco AnyConnect , uninstall and then reinstall them. Check Network Services: services.msc , and hit Enter. Network Setup Service Ensure its Startup Type 💻 Step 3: Verify System Integrity Corrupted system files can prevent driver registration. Command Prompt as Administrator. sfc /scannow and press Enter. Wait for the scan to finish and repair any files. Run Windows Update to ensure your OS is fully patched. 🛑 Step 4: Final Installation Attempt Download a fresh installer of the latest Kaspersky version kaspersky error 27300 klif.sys-x64

Disable any other active firewall or "cleanup" software during the install. If you are in the United States , note that Kaspersky services have faced significant federal restrictions and bans due to national security concerns. If the error persists, you may need to Reset your PC via Windows Settings to clear deep-rooted registry errors. If you'd like to try a specific tool, let me know: Do you have installed? Are you on Windows 10 Are you trying to install the

Error 27300 when installing a Kaspersky application for home

Preventing Future Occurrences

1. Technical Analysis

Method 2: Remove Conflicting Antivirus Drivers Manually

If you previously had other antivirus software, their own filter drivers remain active and conflict with klif.sys. Use the Autoruns tool from Microsoft Sysinternals. Kaspersky Error 27300 occurs when the installer fails

Steps:

  1. Download Autoruns (official Microsoft tool).
  2. Run as Administrator.
  3. Go to the Drivers tab.
  4. Look for drivers from:
    • McAfee (mfehidk, mfewfpk)
    • Norton (symefasi, symefa, symevnt)
    • Avast (aswSnx, aswSP)
    • AVG (avgldx64, avgidsha)
    • Bitdefender (bdvedisk, bdfwfpf)
    • Windows Defender (WdBoot, WdFilter)
  5. Uncheck (disable) or right-click → Delete them.
  6. Reboot and retry Kaspersky installation.

Warning: Disabling Windows Defender drivers may require temporarily turning off “Memory Integrity” (Core Isolation) in Windows Security.

Q1: Is klif.sys a virus or malware?

No. klif.sys is a legitimate Kaspersky driver. However, malware sometimes uses similar filenames. Verify digital signature: right-click klif.sys → Properties → Digital Signatures → should show “Kaspersky Lab”. Preventing Future Occurrences

Solution 6: Update Windows and Drivers

Ensure your Windows operating system and drivers are up to date.

  1. Go to Settings.
  2. Click on "Update & Security."
  3. Click on "Windows Update."
  4. Follow the prompts to download and install any available updates.

Solution 1: Update Kaspersky Antivirus

Ensure you're running the latest version of Kaspersky antivirus. Sometimes, updating the software can resolve issues with outdated drivers.

  1. Open Kaspersky antivirus.
  2. Click on the "Update" or "Check for Updates" button.
  3. Follow the prompts to download and install any available updates.