What is npf.sys?
npf.sys is part of WinPcap and developed by CACE Technologies according to the npf.sys version information.
npf.sys's description is "npf.sys (NT5/6 x86) Kernel Driver"
npf.sys is digitally signed by CACE TECHNOLOGIES, LLC.
npf.sys is usually located in the 'C:\WINDOWS\system32\drivers\' folder.
None of the anti-virus scanners at VirusTotal reports anything malicious about npf.sys.
If you have additional information about the file, please share it with the FreeFixer users by posting a comment at the bottom of this page.
Vendor and version information [?]
The following is the available information on npf.sys:
| Property | Value |
|---|---|
| Product name | WinPcap |
| Company name | CACE Technologies |
| File description | npf.sys (NT5/6 x86) Kernel Driver |
| Internal name | NPF + TME |
| Original filename | npf.sys |
| Legal copyright | Copyright © 2005-2007 CACE Technologies. Copyright © 1999-2005 NetGroup, Politecnico di Torino. |
| Product version | 4.0.0.755 |
| File version | 4.0.0.755 |
Here's a screenshot of the file properties when displayed by Windows Explorer:
| Product name | WinPcap |
| Company name | CACE Technologies |
| File description | npf.sys (NT5/6 x86) Kernel Driver |
| Internal name | NPF + TME |
| Original filename | npf.sys |
| Legal copyright | Copyright © 2005-2007 CACE Technolo.. |
| Product version | 4.0.0.755 |
| File version | 4.0.0.755 |
Digital signatures [?]
npf.sys has a valid digital signature.
| Property | Value |
|---|---|
| Signer name | CACE TECHNOLOGIES, LLC |
| Certificate issuer name | VeriSign Class 3 Code Signing 2004 CA |
| Certificate serial number | 627c3188a96510fb5c59d841d55bb3ab |
VirusTotal report
None of the 50 anti-virus programs at VirusTotal detected the npf.sys file.
Folder name variants
npf.sys may also be located in other folders than C:\WINDOWS\system32\drivers\. The most common variants are listed below:
- C:\WINNT\system32\drivers\
Other files also named npf.sys
npf.sys (41 votes)
Hashes [?]
| Property | Value |
|---|---|
| MD5 | b15e0180c43d8b5219196d76878cc2dd |
| SHA256 | a4a102aab8f91a5b452ae2c9a40f5ebc07bc62af892af57d6e3ad1f4340486ab |
What will you do with npf.sys?
To help other users, please let us know what you will do with npf.sys:
Malware or legitimate?
If you feel that you need more information to determine if your should keep this file or remove it, please read this guide.
And now some shameless self promotion ;)
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Comments
Please share with the other users what you think about this file. What does this file do? Is it legitimate or something that your computer is better without? Do you know how it was installed on your system? Did you install it yourself or did it come bundled with some other software? Is it running smoothly or do you get some error message? Any information that will help to document this file is welcome. Thank you for your contributions.
I'm reading all new comments so don't hesitate to post a question about the file. If I don't have the answer perhaps another user can help you.
No comments posted yet.