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File Version : v3.60a (Lab01_N.010510-0033)
Description : Adaptec Ultra SCSI miniport
Copyright : Copyright Adaptec, Inc. 2000
Product Version : 5.1.2474.0
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : RTC_XX_NT51_0003 V1A4A24A3 RTC03
File Size: 56960 byte(s) 55.640 KB
MD5 : b7fe594a7468aa0132deb03fb8e34326
SHA1: 22E79761B687A945AF616F38965D989C8E39481B

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How to Install aic78xx.sys
Repair Sys ProblemsFixing a corrupted or missing aic78xx.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.