System instability, blue screen errors or unexpected crashes in Windows can often be linked to drivers. In particular, drivers that are old, faulty or have no digital signature may pose a risk to system security and stability. This is where Windows’ built-in Sigverif tool comes into play. Sigverif, that is, File Signature Verification, is a file signature verification tool included in Windows. This tool scans the drivers and some critical files in the system and checks whether they are digitally signed.
What does Sigverif do? Sigverif checks whether the files in the Windows system are signed by a trusted publisher. The digital signature helps understand that the relevant file has been verified by the manufacturer and has not been modified subsequently. This tool is especially useful when investigating driver-related problems. For example, if the system has a blue screen, freezing, or performance problem after installing a new hardware driver, you can check unsigned files with Sigverif.
However, there is an important point: Sigverif is not an antivirus. It doesn’t say for sure whether a file is harmful or not. It only shows the digital signature status of the file. How to open Sigverif in Windows 11? You do not need to download an additional program to open the Sigverif tool. The tool comes built into Windows. Press Win R keys. Type sigverif in the Run window that opens. Press Enter. In the File Signature Verification window that opens, click the Start button.
Wait for the scan to complete. On the results screen, check if there are any unsigned files. Scanning may take several minutes. Once the process is complete, Windows will show you whether unsigned files are found. How to find unsigned drivers with Sigverif? Once the Sigverif scan is completed, the tool can list files whose digital signatures cannot be verified in the system. These files can often be outdated drivers, third-party firmware, or system components that have not been properly signed by the manufacturer.
If a file appears in the list, there is no need to panic. Not every unsigned file is harmful. However, it is important to check which program or driver the file belongs to. You can search the file name on the internet, check the driver of the relevant hardware in the device manager, or download the updated driver from the manufacturer’s official site. Where are the Sigverif results kept? Sigverif scan results are saved in a log file by Windows.
By default, this registry file is located in the following location: C:Windowssigverif.txtBy opening this file with Notepad, you can see which files are checked as a result of the scan and whether any unsigned files are found. What should be done if an unsigned driver is found? If you see an unsigned driver as a result of sigverif, you must first find out which hardware or software the file belongs to. Then, it is recommended to go to the official website of the relevant manufacturer and download the updated and signed driver version.
You can also update the driver via Device Manager: Right-click on the Start menu Device Manager select the relevant hardware Update the driver If the problem started after installing a new driver, you can also try to revert to the previous driver via Device Manager. When should Sigverif be used? If blue screen errors have started to become frequent, the system is unstable after installing a new driver, if you suspect drivers installed for old hardware in the system.
If you want to quickly check for unsigned drivers. It is not a vehicle that needs to be operated constantly in daily use. It is a practical Windows tool that can be used mostly during troubleshooting phases. Sigverif only checks digital signatures. Therefore, it is not a substitute for malware scanning. If you have security doubts, you should run a full system scan with Windows Security, Microsoft Defender, or a reliable antivirus solution.
Still, Sigverif is a quick and useful first check tool, especially for detecting driver-related problems. It is a very practical option for users who want to see unsigned drivers in Windows without installing additional software.
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