Error 27300 Error Installing Driver Klim6sysx64 Exclusive May 2026

27300

Error typically occurs during the installation of Kaspersky software when the system fails to install the klim6.sys (Kaspersky Anti-Virus NDIS Filter) network driver. This is often due to existing driver conflicts, leftover files from previous installations, or an overloaded NDIS filter limit in Windows. Recommended Troubleshooting Steps

• Press Windows key + R, type msconfig, and press Enter.
• Go to the Services tab, check Hide all Microsoft services, and then click Disable all.
• Go to the Startup tab (or Startup Impact in newer Windows versions), and disable all startup items.
• Restart your computer and try to install the driver.

1. Uninstall and reinstall Kaspersky Internet Security: Completely removing and reinstalling Kaspersky Internet Security might resolve the issue.
2. Update Windows and Kaspersky: Ensuring that both Windows and Kaspersky Internet Security are up-to-date can help resolve compatibility issues.
3. Disable conflicting drivers or software: Identifying and disabling any conflicting drivers or software components might allow the klim6sysx64 driver to install successfully.
4. Run system file checker (SFC): Running the System File Checker tool can help identify and repair corrupted system files.
5. Perform a clean boot: Performing a clean boot can help isolate the issue by starting the system with a minimal set of drivers and startup programs.

4. Check for Conflicting Software

• klim6 stands for Kaspersky Lab Intermediate Minifilter 6.
• sys indicates this is a system file (kernel driver).
• x64 denotes it is built for 64-bit versions of Windows.

1. Press Win + R, type devmgmt.msc, and hit Enter to open Device Manager.
2. Click View in the top menu and select Show hidden devices.
3. Expand the Network adapters section.
4. Look for any adapters that mention Kaspersky, Klim, or are grayed out.
5. Right-click these entries and select Uninstall device. If prompted, check the box that says "Attempt to remove the driver for this device."
6. Restart your computer and attempt the installation again.