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File version : 1, 11, 0, 0
Description : NDIS 5.0 USB Infra-Red Driver
Copyright : Copyright (C) SigmaTel, Inc. 2000
Product Version :
Product Name : SigmaTel STIr4200
Company Name : SigmaTel, Inc.
Internal name : StIrUsb.sys
File Size: 27348 byte(s) 26.724 KB
MD5 : f8f82dd8cd45d38353e81f5a0dc6840e
SHA1: 39391F29B4168AD162913E99F7835EC8A6077DBF

Download MR740S.sys
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How to Install MR740S.sys
Repair Sys ProblemsFixing a corrupted or missing MR740S.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.