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File Version : 3.46
Description : USB Serial line emulation
Copyright : Copyright 2005-2006, PHILOG SA.
Product Version : 3.46
Product Name : USB serial line emulation driver
Company Name : PHILOG
Internal Name : PhSerUsb.sys
File Size: 48896 byte(s) 47.768 KB
MD5 : 4fbc01b345f7938d84f3031ab3401ac8
SHA1: 56B74A8394F7088A5C2FBB1D311F49B258B253BC

Download PCX504.sys
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How to Install PCX504.sys
Repair Sys ProblemsFixing a corrupted or missing PCX504.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.