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File Version : 5.1.2600.0 (XPClient.010817-1148)
Description : AdvanSys SCSI Card Driver
Copyright : (C) 1998 Advanced System Products, Inc./RATOC Systems,Inc.
Product Version : 5.1.2600.0
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : ASC3350P.SYS 2.9G_MS
File Size: 22400 byte(s) 21.896 KB
MD5 : 69eb0cc7714b32896ccbfd5edcbea447
SHA1: 672231041EF98C2EA4798EEF1FDB7795FD44957B

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