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File Version : 5.1.2600.0 (XPClient.010817-1148)
Description : DOT4USB filter driver
Copyright : (C) Microsoft Corporation. All rights reserved.
Product Version : 5.1.2600.0
Product Name : Microsoft(R) Windows(R) Operating System
Company Name : Microsoft Corporation
Internal Name : dot4usb.sys
File Size: 23808 byte(s) 23.256 KB
MD5 : 5c27c1d657a4f7d6f67937ed29724a70
SHA1: D7A066AAA7FF5922467B5F2DCA3AE2A7BE3B841E

Download cyclom-y.sys
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How to Install cyclom-y.sys
Repair Sys ProblemsFixing a corrupted or missing cyclom-y.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.