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File Version :
Description : Realtek USB Mass Storage Driver for 2K/XP/Vista
Copyright : Copyright (C) Realtek Corp.
Product Version :
Product Name : Realtek USB Mass Storage Driver for 2K/XP/Vista
Company Name : Realtek Semiconductor Corporation
Internal Name : RTS5121.sys
File Size: 156160 byte(s) 152.512 KB
MD5 : 680a7aba84a7863c89b5440c9c1e0895
SHA1: 856893957D90716EC0C31A0291CAE0EB3A9CCC52

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