Have you found TrojanDownloader:Win32/Nistio.A on your computer but still cannot completely remove it by now? If so, you have come to the right place. The removal guide in this post will tell you how to easily and completely remove TrojanDownloader:Win32/Nistio.A from your computer for good.
Definition
TrojanDownloader:Win32/Nistio.A is a harmful Trojan horse that can stealthily download other malicious programs or files onto the targeted computer. This Trojan horse is used by the rogue hackers to gain access to the infected computer to steal the valuable data and private information of the user.
Harmful Activities Performed by the Trojan Horse
If this Trojan horse infects your computer, it will hide itself in the background of your system and perform a range of harmful activities which have been listed as follows:
It slows down your computer performance by consuming a lot of precious resources.
It causes occasional system crash or freezing by deleting important system files randomly.
It further impairs your system by downloading a lot of threats like virus, worm, spyware and adware onto your computer.
It helps the remote hackers to visit your computer without your knowledge by opening a backdoor.
It gathers your confidential information for the hackers by using a key logger.
Main Causes of the Infection
The hackers tend to insert TrojanDownloader:Win32/Nistio.A into some insecure websites, free software or email attachments so as to achieve the goal of letting you download such Trojan horse without any awareness. Your computer gets infected with the malicious Trojan horse usually because you have the following online activities:
Visit unsafe websites like phishing sites or pornographic websites.
Download freeware, shareware or other free media players from questionable websites.
Click on suspicious links which will take you to the infected websites.
Download spam email attachments that are bundled with such Trojan horse.
Guide to Manually Remove TrojanDownloader:Win32/Nistio.A
Note: Since the manual removal is a complicated task which involves the deletion of files and registry entries, we sincerely suggest that you back up the Windows registry and important data and before you start to the manual removal. Then, follow the steps to remove the Trojan horse.
1. Restart your infected computer.
2. As it starts up, you should tap the key F8 several times until the Windows Advanced Options Menu appears on the screen.
3. Highlight the “Safe Mode with Networking” option by using the arrow keys.
4. Press Enter to proceed.
5. Press keys CTRL+ALT+DEL together to open the Windows Task Manager.
6. Go to “Processes” tab, search for and stop the processes related to TrojanDownloader:Win32/Nistio.A.
7. Locate the files listed below and delete all of them from your computer.
%AppData%\Bifrost\server.exe
%ProgramFiles%\random.exe
C:\WINDOWS\trlrokgq
C:\Documents and Settings\Administrator\Local Settings\Temp\dinotifyb.exe
C:\Documents and Settings\Administrator\Local Settings\nsg8.tmp\execpri.dll
C:\Documents and Settings\Administrator\Local Settings\Temp\nsg8.tmp\inetc.dll
8. Click on the Start menu and go to Run.
9. Type “regedit” into the dialog box and press Enter. This will open the Registry Editor.
10. In the Registry Editor, find out and remove the registry entries associated with the Trojan horse.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Current Version\Run\random.exe”
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Explorer\Navigating
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations
HKEY_CURRENT_USER\Software\Microsoft\CurrentVersion\Run\”MSN” = “%Temp%\34542.exe”
12. Reboot your computer back to the normal mode to check whether the Trojan horse has been completely removed from your computer.
TrojanDownloader:Win32/Nistio.A is a malicious Trojan horse which needs to be removed from your computer timely. If you have followed the guide above and finally removed this threat, then congratulate to you. But if not, don’t be upset. You can remove this threat not only in the manual way but also in the automatic one. To automatically remove TrojanDownloader:Win32/Nistio.A, you need to equip your computer with a powerful removal tool. “A powerful removal tool” means that this tool can detect and remove various malicious threats from your computer. You can easily find one by searching the Internet. It should be pointed out that if you are not proficient in computer, we highly recommend that you get rid of the Trojan horse using a removal tool instead of manually removing it rashly.
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