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File Version : V5.10.22
Description : NDIS 5.0 miniport driver for Adaptec Duralan Ethernet Adapters
Copyright : Copyright Adaptec, Inc.2000
Product Version : V5.1.0.0
Product Name : Adaptec Duralan Ethernet Adapters
Company Name : Adaptec, Inc
Internal Name : ADPTSF.SYS
File Size: 46112 byte(s) 45.32 KB
MD5 : 00c8bea30481b38aa0a72e2ca49e576d
SHA1: AF2BF2E2DB2434E160FCBF99A31E7F12A3E8DB9C

Download adptsf50.sys
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How to Install adptsf50.sys
Repair Sys ProblemsFixing a corrupted or missing adptsf50.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.