What is BS_DEF.sys?
BS_DEF.sys is part of Support SST39SF020,SST29EE020,AT49F002T,AT29C020,AM29F002NT,AM29F002NB,V29C51002T,V29C51002B,M29F002T,W29C020. and developed by AsusTek Computer Inc. according to the BS_DEF.sys version information.
BS_DEF.sys's description is "Default BIOS Flash Driver"
BS_DEF.sys is digitally signed by ASUSTeK Computer Inc..
BS_DEF.sys is usually located in the 'c:\Windows\' folder.
None of the anti-virus scanners at VirusTotal reports anything malicious about BS_DEF.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 BS_DEF.sys:
| Property | Value |
|---|---|
| Product name | Support SST39SF020,SST29EE020,AT49F002T,AT29C020,AM29F002NT,AM29F002NB,V29C51002T,V29C51002B,M29F002T,W29C020. |
| Company name | AsusTek Computer Inc. |
| File description | Default BIOS Flash Driver |
| Internal name | Bs_Def64.sys |
| Original filename | Bs_Def64.sys |
| Legal copyright | Copyright (C) AsusTek Computer. 1992-2004 |
| Product version | 1.24 |
| File version | 1.24 built by: WinDDK |
Here's a screenshot of the file properties when displayed by Windows Explorer:
| Product name | Support SST39SF020,SST29EE020,AT49F0.. |
| Company name | AsusTek Computer Inc. |
| File description | Default BIOS Flash Driver |
| Internal name | Bs_Def64.sys |
| Original filename | Bs_Def64.sys |
| Legal copyright | Copyright (C) AsusTek Computer. 1992.. |
| Product version | 1.24 |
| File version | 1.24 built by: WinDDK |
Digital signatures [?]
BS_DEF.sys has a valid digital signature.
| Property | Value |
|---|---|
| Signer name | ASUSTeK Computer Inc. |
| Certificate issuer name | VeriSign Class 3 Code Signing 2004 CA |
| Certificate serial number | 37ed9092bdd1dccf58d2afa47f961448 |
VirusTotal report
None of the 42 anti-virus programs at VirusTotal detected the BS_DEF.sys file.
Hashes [?]
| Property | Value |
|---|---|
| MD5 | 75768ce56dc58ba38eae38ba4741af6e |
| SHA256 | c044165fa51de3239589d190dd812ec685fa86ee9414bc877a45da8b9a342dc9 |
What will you do with BS_DEF.sys?
To help other users, please let us know what you will do with BS_DEF.sys:
What did other users do?
The poll result listed below shows what users chose to do with BS_DEF.sys. 45% have voted for removal. Based on votes from 11 users.
NOTE: Please do not use this poll as the only source of input to determine what you will do with BS_DEF.sys. Only 11 users has voted so far so it does not offer a high degree of confidence.
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 ;)
Hi, my name is Roger Karlsson. I've been running this website since 2006. I want to let you know about the FreeFixer program. FreeFixer is a freeware tool that analyzes your system and let you manually identify unwanted programs. Once you've identified some malware files, FreeFixer is pretty good at removing them. You can download FreeFixer here. It runs on Windows 2000/XP/2003/2008/2016/2019/Vista/7/8/8.1/10. Supports both 32- and 64-bit Windows.
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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.