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File Version : 4.8.1356.0
Description : avast! File System Access Blocking Driver
Copyright : Copyright (c) 1996-2009 ALWIL Software
Product Version : 4.8
Product Name : avast! Antivirus System
Company Name : ALWIL Software
Internal Name : aswFsBlk.sys
File Size: 22096 byte(s) 21.592 KB
MD5 : 5bab6d80435f9dff95a7e86c69110b32
SHA1: 74E3372D3D5219CBD2ED19A584D0841C63729648

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