TechyGeeksHome Cisco VPN Client Fix for Windows 8.1 and 10 SYS cag.sys

How to Download and Fix Cag.sys Errors

Last Updated: 12/07/2024
[Average Article Time to Read: 4.7 minutes]

Access Gateway 64bit Plugin files such as cag.sys utilize the SYS file extension. This file is considered a Win64 EXE (Executable application) file, and was first created by TechyGeeksHome for the Cisco VPN Client Fix for Windows 8.1 and 10 3.6 software package.

The first release in the Windows 10 Operating System for cag.sys was on 08/02/2018 inside Cisco VPN Client Fix for Windows 8.1 and 10 3.6. This file release marks the latest and most updated version from TechyGeeksHome.

Below, you find comprehensive file information, instructions for simple SYS file troubleshooting, and list of free cag.sys downloads for each available file version.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	cag.sys
File Extension:	SYS file extension
Description:	Access Gateway 64bit Plugin
Object File Type:	Executable application
File Operating System:	Windows 32-bit
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	Citrix Systems, Inc.
Software Program:	Cisco VPN Client Fix for Windows 8.1 and 10 3.6
Legal Copyright:	Copyright (c) 2009-2013

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0x31064
Code Size:	82432

View Other cag.sys Information

File Info	Description
File Size:	100 kB
File Modification Date/Time:	2020:01:29 08:07:46+00:00
File Type:	Win64 EXE
MIME Type:	application/octet-stream
Machine Type:	AMD AMD64
Time Stamp:	2013:04:01 13:22:36+00:00
PE Type:	PE32+
Linker Version:	9.0
Code Size:	82432
Initialized Data Size:	110592
Uninitialized Data Size:	0
Entry Point:	0x31064
OS Version:	6.1
Image Version:	6.1
Subsystem Version:	6.0
Subsystem:	Native
File Version Number:	1.1.0.254
Product Version Number:	4.13.1.18543
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Windows 32-bit
Object File Type:	Executable application
File Subtype:	0
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	Citrix Systems, Inc.
File Description:	Access Gateway 64bit Plugin
File Version:	1.1.0.254
Internal Name:	cag
Legal Copyright:	Copyright (c) 2009-2013
Product Version:	4.13.1.18543

^✻ Portions of file data provided by Exiftool (Phil Harvey) distributed under the Perl Artistic License.

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What are cag.sys Error Messages?

cag.sys Blue Screen of Death (BSOD) Errors

There are a number of reasons why you could be encountering issues with cag.sys. Most of the issues concerning sys files involve Blue Screen of Death (BSOD) errors. These types of cag.sys errors can be cause by hardware problems, outdated firmware, corrupt drivers, or other software-related (eg. Cisco VPN Client Fix for Windows 8.1 and 10 update) issues. Some of these errors include:

cag.sys could not be found.
cag.sys failed to load.
The file cag.sys is missing or corrupt.
Windows failed to start - cag.sys.

A problem has been detected and Windows has been shut down to prevent damage to your computer. The problem seems to be caused by the following file: cag.sys.

:( Your PC ran into a problem that it couldn't handle, and now needs to restart. You can search for the error online: [BSOD] (cag.sys).

STOP 0x0000003B: SYSTEM SERVICE EXCEPTION (cag.sys) STOP 0×0000007A: KERNEL DATA INPAGE (cag.sys) STOP 0x00000050: PAGE FAULT IN A NONPAGED AREA (cag.sys) STOP 0x0000007E: SYSTEM THREAD EXCEPTION NOT HANDLED (cag.sys) STOP 0x0000000A: IRQL NOT LESS EQUAL (cag.sys) STOP 0x0000001E: KMODE EXCEPTION NOT HANDLED (cag.sys)

It's Critical to Resolve Blue Screen of Death Errors

In the majority of cases, you will encounter cag.sys BSOD errors after you've installed new hardware, software (Cisco VPN Client Fix for Windows 8.1 and 10), or performed a failed Windows Update. In other cases, software corruption caused by a malware infection can lead to cag.sys Blue Screen of Death errors. Therefore, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

GEEK TIP : As a rule of thumb, it's always a good idea to create a Windows "Snapshot" backup / System Restore Point before making any hardware or software changes to your computer. That way, it's very easy to restore your system in the unfortunate event you encounter a cag.sys Blue Screen of Death error after recent changes.

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How to Fix cag.sys Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your cag.sys issue. These troubleshooting steps are listed in the recommended order of execution.

Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
When you see the search box, type "System Restore" and press "ENTER".
In the search results, find and click System Restore.
Please enter the administrator password (if applicable / prompted).
Follow the steps in the System Restore Wizard to choose a relevant restore point.
Restore your computer to that backup image.

If the Step 1 fails to resolve the cag.sys error, please proceed to the Step 2 below.

Step 2: If recently installed Cisco VPN Client Fix for Windows 8.1 and 10 (or related software), uninstall then try reinstalling Cisco VPN Client Fix for Windows 8.1 and 10 software.

You can uninstall Cisco VPN Client Fix for Windows 8.1 and 10 software by following these instructions (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
In the search box, type "Uninstall" and press "ENTER".
In the search results, find and click "Add or Remove Programs"
Find the entry for Cisco VPN Client Fix for Windows 8.1 and 10 3.6 and click "Uninstall"
Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Cisco VPN Client Fix for Windows 8.1 and 10 software.

If this Step 2 fails as well, please proceed to the Step 3 below.

Cisco VPN Client Fix for Windows 8.1 and 10 3.6

TechyGeeksHome

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many cag.sys error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

Hit the Windows Start button
In the search box, type "Update" and press "ENTER".
In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
If updates are available for download, click "Install Updates".
After the update is completed, restart your PC.

If Windows Update failed to resolve the cag.sys error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

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If Those Steps Fail: Download and Replace Your cag.sys File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate cag.sys file version. We maintain a comprehensive database of 100% malware-free cag.sys files for every applicable version of Cisco VPN Client Fix for Windows 8.1 and 10. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download cag.sys Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy this file to the appropriate Cisco VPN Client Fix for Windows 8.1 and 10 folder location:

Windows 10: C:\Windows\System32\drivers\
Windows 10: C:\Program Files\Common Files\Deterministic Networks\DNE\x64\
Windows 10: C:\Windows\System32\DriverStore\FileRepository\dnelwf.inf_amd64_2340d4e197dfcd04\x64\
Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve cag.sys problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.

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Download cag.sys Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying cag.sys to your appropriate Windows system directory. TechyGeeksHome typically does not release Cisco VPN Client Fix for Windows 8.1 and 10 SYS files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing cag.sys and all other SYS files for Cisco VPN Client Fix for Windows 8.1 and 10. An incorrectly installed SYS file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Cisco VPN Client Fix for Windows 8.1 and 10 3.6

File Name

Software Version

File Version

Architecture

cag.sys

4.13.1.18543

1.1.0.254

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software Version:	4.13.1.18543
File Version:	1.1.0.254
File Size:	102160
File Date:	01/29/2020
MD5 Checksum:	678dc98c97f7df3bb248bd40935dc9dc
SHA1 Checksum:	db6838537372a9dc00b0107ecc58110b32079c1b
SHA256 Checksum:	b7c2b785a1fe74cd62f8e58dba9dd5e58159be2dd58156be3026b406685d3549
CRC32:
File Directory Location:	C:\Windows\System32\drivers\ C:\Program Files\Common Files\Deterministic Ne ... C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win64 EXE
Image Version:	6.1
Initialized Data Size:	110592
Linker Version:	9.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	6.0
File Modification Date/Time:	01/29/2020

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Files Related to cag.sys

SYS Files Related to cag.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
dne64x.sys	Deterministic Network Enhancer for NDIS 5.1	DNE (4.18.9.18809)	139064	C:\Windows\System32\winevt\Logs\
NXQuery.sys	NX Support Check	Microsoft® Windows® Operating System (10.0.18362.1)	16024	C:\Users\Tester\AppData\Local\Packages\Microsof...
wanscalr.sys	Orbital Driver	Citrix CloudBridge Plug-in (14.16.3.18700)	75984	C:\Windows\System32\winevt\Logs\
winsetupboot.sys	SetupPlatform NEO Mini-Filter	Microsoft® Windows® Operating System (10.0.18362.590)	66360	C:\Program Files\Common Files\Microsoft Shared\...
cag.sys	Access Gateway 64bit Plugin	Cisco VPN Client Fix for Windows 8.1 and 10 3.6	102160	C:\Windows\System32\winevt\Logs\

Other Files Related to cag.sys

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WmiApRpl.ini	Windows Initialization	Cisco VPN Client Fix for Windows 8.1 and 10 3.6	29736	C:\Windows\inf\WmiApRpl\0009\
EtwRTDiagLog.etl	Microsoft Event Trace Log	Cisco VPN Client Fix for Windows 8.1 and 10 3.6	1320	C:\Windows\System32\LogFiles\WMI\RtBackup\
api-ms-win-core-rtlsup...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.17134.12)	10600	C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
BootCKCL.etl	Microsoft Event Trace Log	Cisco VPN Client Fix for Windows 8.1 and 10 3.6	17825792	C:\Windows\System32\wdi\LogFiles\

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