How to remove the Assistant virus

Most antivirus programs identify Assistant.dll as malware—for instance TrendMicro identifies it as ADW_SPROTECT, and Kaspersky identifies it as not-a-virus:AdWare.Win32.Esprot.bpez.

The free file information forum can help you find out how to remove it. If you have additional information about this file, please leave a comment or a suggestion for other users.

Click to Run a Free Virus Scan for the Assistant.dll malware

Assistant.dll file information

The process belongs to software SW-Sustainer or WS-Sustainer or WS-Supporter or SO_Sustainer or PC_Sustainer or GS Supporter by unknown.

Description: Assistant.dll is not essential for Windows and will often cause problems. Assistant.dll is located in a subfolder of "C:\Program Files" or sometimes in the "C:\Program Files" folder. Known file sizes on Windows 10/8/7/XP are 4,296,192 bytes (45% of all occurrences), 3,041,792 bytes and 8 more variants. 
The program has a visible window. There is no file information. The program is loaded during the Windows boot process (see Registry key: AppInit_DLLs). The file is not a Windows core file. Therefore the technical security rating is 42% dangerous, however you should also read the user reviews.

Uninstalling this variant: You could uninstall SW-Sustainer or WS-Sustainer from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify Assistant.dll related errors

If Assistant.dll is located in a subfolder of the user's profile folder, the security rating is 42% dangerous. The file size is 4,116,480 bytes. The program has a visible window. There is no description of the program. The application is loaded during the Windows boot process (see Registry key: AppInit_DLLs). The file is not a Windows core file.

Uninstalling this variant: You could uninstall Assistant from your computer using the Control Panel applet Uninstall a Program.

Important: You should check the Assistant.dll process on your PC to see if it is a threat. If SW-Sustainer has changed your browser's search engine and start page, you can recover your browser's default settings as follows:

Reset default browser settings for Internet-Explorer ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


User Comments

DrWeb Trojan.Damaged.1 20140520 SUPERAntiSpyware Trojan.Agent/Gen-Nullo[Short] 20140520 Sophos BProtector 20140520 Symantec Bloodhound.MalPE 20140520 TrendMicro-HouseCall TROJ_GEN.F47V0502 20140520
  Sean   (further information)
Spam. Changes search engine and redirects searches. Under Save.ON
seems to be malware related

Summary: Average user rating of Assistant.dll: based on 3 votes with 3 user comments. One user thinks it's neither essential nor dangerous. One user suspects danger. One user thinks Assistant.dll is dangerous and recommends removing it.

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Best practices for resolving Assistant issues

The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active Assistant process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the Assistant.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

Other processes

Assistant.dll [all]