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File Version : 6.1.7600.16385 (win7_rtm.090713-1255)
Description : MS AHCI 1.0 Standard Driver
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 6.1.7600.16385
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : msahci.sys
File Size: 27712 byte(s) 27.64 KB
MD5 : 4326d168944123f38dd3b2d9c37a0b12
SHA1: 615774143DC0DCF7F6572C2847CD9956F5571686

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