What is AmUStor.sys?

AmUStor.sys is part of Alocr Micro USB Mass Storage Driver and developed by Alcor Micro, Corp. according to the AmUStor.sys version information.

AmUStor.sys's description is "Alocr Micro USB Mass Storage Driver"

AmUStor.sys is digitally signed by AlcorMicro, Corp..

AmUStor.sys is usually located in the 'c:\temp\usbvid_058f&pid_6366\program files\AmUStor\XPx64\' folder.

None of the anti-virus scanners at VirusTotal reports anything malicious about AmUStor.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 AmUStor.sys:

PropertyValue
Product nameAlocr Micro USB Mass Storage Driver
Company nameAlcor Micro, Corp.
File descriptionAlocr Micro USB Mass Storage Driver
Internal nameAmUStor.sys
Original filenameAmUStor.sys
Legal copyrightCopyright(C) Alcor Micro, Corp.
Product versionamd64
File versionamd64 built by: WinDDK

Here's a screenshot of the file properties when displayed by Windows Explorer:

Product nameAlocr Micro USB Mass Storage Driver
Company nameAlcor Micro, Corp.
File descriptionAlocr Micro USB Mass Storage Driver
Internal nameAmUStor.sys
Original filenameAmUStor.sys
Legal copyrightCopyright(C) Alcor Micro, Corp.
Product versionamd64
File versionamd64 built by: WinDDK

Digital signatures [?]

AmUStor.sys has a valid digital signature.

PropertyValue
Signer nameAlcorMicro, Corp.
Certificate issuer nameVeriSign Class 3 Code Signing 2010 CA
Certificate serial number39912288ce4d452d114ce35bf07d57eb

VirusTotal report

None of the 47 anti-virus programs at VirusTotal detected the AmUStor.sys file.

None of the 47 anti-virus programs detected the AmUStor.sys file.

Hashes [?]

PropertyValue
MD5e5f36f2ff6e8bc2e9e51655489ea753d
SHA25683a7ba29d411c039511a9306c0136099572ee8e306e1c87207f3e721568c0136

What will you do with AmUStor.sys?

To help other users, please let us know what you will do with AmUStor.sys:



What did other users do?

The poll result listed below shows what users chose to do with AmUStor.sys. 25% have voted for removal. Based on votes from 263 users.

User vote results: There were 66 votes to remove and 197 votes to keep

NOTE: Please do not use this poll as the only source of input to determine what you will do with AmUStor.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.

Please select the option that best describe your thoughts on the information provided on this web page


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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.

Tom Ludwig writes

3 thumbs

My Windows 10 won't boot with "System Thread Exception Not Handled (amustor.sys)

# 20 Mar 2016, 9:43

Heather writes

0 thumbs

My hard drive is full and I'm not the one loading things on it.. i think it's full of logs and apps that I do not want. How do I get rid of those?

# 24 Sep 2017, 6:40

Roger Karlsson writes

0 thumbs

@Heather: You can use Windows Explorer to examine what is taking up space on your hard drive. Just remember that you need to be extremely careful when deleting files and folder.

# 29 Sep 2017, 8:27

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