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File Version : 5.1.2600.2180 (xpsp_sp2_rtm.040803-2158)
Description : PnP Disk Driver
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 5.1.2600.2180
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : scsidisk.sys
File Size: 36352 byte(s) 35.512 KB
MD5 : 00ca44e4534865f8a3b64f7c0984bff0
SHA1: 2F80B250CFE794144D4802CA0BEB45582B2BD242

Download dot4usb.sys
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How to Install dot4usb.sys
Repair Sys ProblemsFixing a corrupted or missing dot4usb.sys error is an easy process with a few steps. Open the zip-file you downloaded.Extract the .sys file to a location on your computer. We recommend you to unzip the file to the directory of the program that is requesting the file.
If that doesn't work, you will have to extract the file to your system directory.
By default, this is C:/WINNT/system32/drivers (Windows NT/2000).
or C:/Windows/system32/drivers (Windows XP, Vista, 7).
Make sure overwrite any existing files (but make a backup copy of the original file)
That should be it. Although not necessary you can reboot your computer as well.