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File Version : 4.01.2010
Description : Kernel mode driver
Copyright : Copyright(C) Crystal Semiconductor 1998
Product Version : 4.01.2010
Product Name : CrystalWare(TM) Driver
Company Name : Crystal Semiconductor Corp.
Internal Name : CWCFM.SYS
File Size: 51520 byte(s) 50.320 KB
MD5 : 29ff5ddf5b636a2762f51d423c61f411
SHA1: 3AF4B70221193019D950A493A176602BD87E4961

Download CyUSB.sys
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How to Install CyUSB.sys
Repair Sys ProblemsFixing a corrupted or missing CyUSB.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.