Check the box that says and click Uninstall . Method 3: Clean the Windows Registry
: Windows Security may flag or automatically remove the driver if it detects it as a threat.
, users frequently encounter issues with this driver because its digital certificate has expired or been revoked, leading to "Digital Signature" errors (Code 52) or security blocks by Windows Defender. Technical Overview
: Emulates a hardware USB dongle to allow protected software to run without a physical key. : Originally credited to "Chingachguk & Denger2k". : Typically located in C:\Windows\System32\drivers\multikey.sys : Modern Windows 11 security features, specifically Memory Integrity (HVCI) Driver Signature Enforcement multikey.sys windows 11
Multikey.sys is a kernel-mode driver in Windows 11 that plays a crucial role in managing multiple keyboard and mouse inputs. This report provides an in-depth analysis of the multikey.sys driver, its functionality, and potential issues.
Q: Can I delete multikey.sys? A: No, it's not recommended to delete multikey.sys, as it may cause issues with input device functionality.
Right-click → → Digital Signatures tab. Check the box that says and click Uninstall
(Note: presence in UpperFilters indicates it's active.)
This was different. It was keystrokes. Biometric data from webcams. Audio snippets from Cortana activations that had been "deleted" locally but cached in the kernel.
Here are some key properties of multikey.sys: Technical Overview : Emulates a hardware USB dongle
This is the most frequent issue. A notification appears stating that “Multtkey.sys removed by Windows Security”. Often, the user does not recall installing any such driver. This alert is not necessarily a sign of infection, but it does indicate that a potentially risky driver was present on your system.
If the file is legitimate (e.g., from a gaming keyboard):