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File Version : (NT.080820-1745)
Description : Adaptec SAS RAID WS03 Driver
Copyright : Copyright 2008 Adaptec, Inc. All rights reserved.
Product Version :
Product Name : Adaptec RAID Controller
Company Name : Adaptec, Inc.
Internal Name : arcsas.sys.B16119.mcb
File Size: 86608 byte(s) 84.592 KB
MD5 : 5d6f36c46fd283ae1b57bd2e9feb0bc7
SHA1: E820C1D841F066611DB31E58EBF42DA5A99F95C5

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