The Windows 7 Blue Screen error problems are so many and if you search forums, blogs and net you’ll find long discussions on this subject.

You may get vsdatant.sys blue screen error in Windows 7.  The netio.sys error also is the cause for BSOD errors.

Even if you search the official microsoft forms, Microsoft engineers ask you about dumps and other related information to diagnose your problem.

Sometimes giving unrelated solutions, only to find out the solution had a different reason.


1. Problem : Windows 7 64 Bit BSOD Error caused by vsdatant.sys

Solution: According to this resource, all the dumps generated pointed out that the BSOD errors (vsdatant.sys) were due to a driver installed my ZoneAlarm.

The simple solution to this problem is uninstall ZoneAlarm and re-install it.

I better advice not to use ZoneAlarm Firewall at all, as one-time it totally blocked my internet, after which I had to do a free re-install of Windows 7 again.

Related Error Code –

Sometimes this error may be also due to wireless adapter (like in this case, Linksys(Cisco) drivers where the official drivers were non-existing and had to be downloaded from Rainlink website).

This file (vsdatant.sys) may be also related to Cisco VPN client. The ZoneAlarm Internet Security Suite is also a problem sometimes.

So many a times, the problem could be due to incompatible issues between Cisco VPN Applications and ZoneAlarm.

You can use software like Perfect Uninstaller to completely uninstall ZoneAlarm Firewall and any of it’s associated products.

Also in the 2023, the default standalone uninstaller completely removes ZA without any remnants.

2. Problem: Windows 7 64 Bit BSOD caused by NetIO.sys

Solution: Somebody was having the following system setup.

  • Dell Studio 1558 with 8GB of RAM, Intel i7 Processor Q 840 @ 1.87 GHz (8M cache), 64-bit Operating System and ATI Mobility Radeon HD 5470 1 GB Graphic Card with Windows 7 Ultimate edition.
  • HP BL685 G7 running Windows Server 2008 R2 Core with Hyper-V.

The most likely cause is due to anti virus software like McAfee, Kaspersky and Norton.

Uninstall these software and see if this solves the problem. Otherwise, do a “clean bootup” and see that changes anything.

This can also happen after you update to Win 7 SP1. Sometimes, you have very large number of connections in bittorrent and this also causes the problem.

3.  Problem: Windows 7 64 Bit BSOD Error caused by BitTorrent clients (eg. Utorrent)

Solution: Somebody using Windows 7 64 Bit Home Premium on ACER X1900 system had his computer shutdown suddenly and display the message “blue screen”.

The best solution is to completely remove Utorrent or related software. This is generally caused by 3rd party security programs like McAfee.

Sometimes, the problem is in your anti virus software like Kaspersky 2010.

Since there are incompatibility issues between large number of connections in torrent clients like Utorrent, Bittorrent etc and anti virus software like McAfee, Kaspersky, Norton etc, it’s advisable to disable the anti virus software and reduce the connections and see if it solves the problem.

4. Sometimes the BSOD errors are also caused by BAD RAM. Use RAM testing tools like Memtest86 to find out RAM errors.

How to Fix Blue Screen of Death (BSoD) Errors in Windows 7

If you are a Windows 7 user, you might have encountered the dreaded Blue Screen of Death (BSoD) error at some point.

This error occurs when Windows encounters a serious problem that causes it to shut down or restart unexpectedly.

The screen turns blue and displays some technical information that might be useful for troubleshooting, but can also be confusing and intimidating for most users.

The BSoD error can be caused by various factors, such as hardware failures, driver conflicts, corrupted system files, malware infections, or incompatible software.

Sometimes, it can be fixed by simply restarting your computer, but other times it might require more advanced steps to resolve the issue.

In this blog post, we will show you some common methods to fix BSoD errors in Windows 7 and prevent them from happening again.

Method 1: Disable Automatic Restart

One of the first things you should do when you encounter a BSoD error is to disable the automatic restart option. This will allow you to read the error message and write down the error code and other details that might help you identify the cause of the problem.

To disable automatic restart in Windows 7, follow these steps:

  • Right-click on My Computer and select Properties.
  • Go to the Advanced tab and click on Settings under Startup and Recovery.
  • Uncheck the box next to Automatically restart under System failure and click OK.

The next time you encounter a BSoD error, Windows will not restart automatically and you will be able to see the error message on your screen.

Method 2: Use System Restore

System Restore is a feature that allows you to restore your computer to a previous state when it was working properly. This can help you undo any recent changes that might have triggered the BSoD error, such as installing new software or drivers.

To use System Restore in Windows 7, follow these steps:

  • Click on Start and type System Restore in the search box.
  • Select System Restore from the list of results and follow the instructions on your screen.
  • Choose a restore point that dates back to before you experienced the BSoD error and click Next.
  • Confirm your choice and wait for System Restore to complete.

After System Restore finishes, your computer will restart and hopefully run without any errors.

Method 3: Update Your Drivers

Drivers are software components that allow your hardware devices to communicate with your operating system.

Outdated or faulty drivers can cause compatibility issues and lead to BSoD errors.

Therefore, it is important to keep your drivers updated with the latest versions from their manufacturers.

To update your drivers in Windows 7, follow these steps:

  • Click on Start and type Device Manager in the search box.
  • Select Device Manager from the list of results and expand each category of devices.
  • Right-click on any device that has a yellow exclamation mark next to it and select Update Driver Software.
  • Choose Search automatically for updated driver software and wait for Windows to find and install new drivers for your device.
  • Repeat this process for any other device that needs updating.

Alternatively, you can use a third-party tool that can scan your computer for outdated drivers and update them automatically with one click.

Method 4: Scan Your Computer for Malware

Malware is malicious software that can infect your computer without your knowledge or consent.

It can cause various problems such as slowing down your system performance, stealing your personal information, displaying unwanted ads or pop-ups, or even causing BSoD errors.

Therefore, it is essential to scan your computer regularly with a reliable antivirus program like Microsoft Security Essentials or Malwarebytes Anti-Malware.

To scan your computer for malware in Windows 7, follow these steps:

  • Download an antivirus program of your choice from its official website if you don’t have one already installed on your computer.
  • Run a full system scan with your antivirus program by following its instructions on how to do so.
  • Delete or quarantine any detected threats from your computer.
  • Restart your computer if prompted by your antivirus program.

Method 5: Reinstall Windows 7

If none of the above methods work for you or if you are unable to boot into Windows at all due to BSoD errors, then you might need to reinstall Windows 7 from scratch. This will erase everything on your hard drive including all files, programs settings etc., so make sure you backup any important data before proceeding with this method.

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  1. eu ainda te amo livro says:

    I really enjoyed your article. Congrats on the content. 69260493

  2. Arnab Mukherjee says:

    Thanks for your Suggestion. Will the Perfect Uninstaller for Zone alarm also work for Windows 10 ?
    Thanks & regards

  3. Bard Einset says:

    Thanks for brilliant suggestions! I have recently force-installed Win 8.1 on a Dell Alienware Aurora, and I’ve been having a lot of BSOD. After using Verifier to isolate what drivers are causing problems, VSDATANT.SYS was singled out as one possible source… Will take some actions, though as of today, I’m only probing the issue…
    Best, Bard