How to Remove PUP.Optional.InstallCore.A Easily (Removal Guide)?

By | June 23, 2015

PUP.Optional.InstallCore.A is detected in your system after you download certain software? Your security tools cannot get rid of it permanently? You try to manually fix this problem but no luck? Here is some advice on how to remove this program. Hope that you can get help from it.

What is PUP.Optional.InstallCore.A?

PUP.Optional.InstallCore.A is a notorious potentially unwanted program usually detected as a risky infection by antivirus. This program usually appears together with a lot of rogue programs and can modify the Windows Registry to add itself as a start-up operation. So once infected, you will get advertising redirects when using your default browser so that your online browsing experience is interrupted. This program can be dangerous. If you are the one who get this infection, you may face with money loss, important privacy leakage or even system sluggish.

PUP.Optional.InstallCore.A is usually installed without your knowledge because it comes into the vulnerable PCs through bundling to other software, especially freeware. You may also get infected due to the clicking on the ransom popups and sponsored links. If you download and install the infected freeware without checking the attached tools, this PUP will settle in your computer and work in the background.

How to Remove PUP.Optional.InstallCore.A?

PUP.Optional.InstallCore.A. is dangerous enough to make your computer abnormal. You are not recommended to keep it in your PC. Please read the instructions below to remove this unwanted program. To get better security, you are highly recommended to install powerful anti-malware tool to fix your PC.

Guide 1: Manually Remove PUP.Optional.InstallCore.A and Optimize Your PC.

Step 1. Press Ctrl+Alt+Del keys together and stop the random processes in the Windows Task Manager.

Windows Task Manager

Random.exe (The name of the virus process may be different all the time)

Step 2. Disable any suspicious startup items that are made by PUP.Optional.InstallCore.A.

Windows Vista or Windows7:

Click start menu→type msconfig in the search bar → open System Configuration →Disable all possible startup items generated.

Windows XP:

Click Start menu -> click Run -> type: msconfig in the search bar -> open System Configuration Utility -> Disable all possible startup items including this Trojan:

Step 3. Show hidden files and folders.

Click on the Start menu and find Folder Options in Control Panel, select the View tab, and then tick Show hidden files and folders and non-tick Hide protected operating system files (Recommended) and then click OK.


Step 4. Delete associated files from your PC completely as follows:

%program files %\internet explorer\ PUP.Optional.InstallCore.A \[random].mof
%windir%\temp\ PUP.Optional.InstallCore.A.exe
%UserProfile%\Application Data\Microsoft\[random].exe
%System Root%\Samples
%User Profile%\Local Settings\Temp
%Documents and Settings%\All Users\Start Menu\Programs\PUP.Optional.InstallCore.A
%Documents and Settings%\All Users\Application Data\PUP.Optional.InstallCore.A

Step 5. Navigate to Registry Editor and clean up all PUP.Optional.InstallCore.A registry entries.

Press Win+ R key at and same time to open Run Commend Box. Open Registry Editor by typing “regedit” in Runbox and clicking OK.


Look through the registry entries and find out all listed harmful items. Right click on them and click Delete to remove.

registry editor

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "<random>" = "%AppData%\<random>.exe"
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run "<random>" = "%AppData%\<random>.exe"EY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “.exe”ft\Windows\CurrentVersion\Run\PUP.Optional.InstallCore.A
HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = C:\WINDOWS\Network Diagnostic\
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\[random]
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msmpeng.exe “Debugger” = ‘svchost.exe’
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msseces.exe “Debugger” = ‘svchost.exe’
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run “3948550101”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “xas”

Step 6. Speed up and optimize your PC with RegCure Pro. (Highly Recommended)

RegCure Pro has what you need to clean your computer as well as optimize it. It is packed with the tools you need to boost your PC’s speed and performance. You are welcomed to follow the guide below and install it.

1). Click the icon to download RegCure Pro.


2). Click “Yes” to run the profile.

RegCure Pro 1

3). Click “Next Button” and finish the installation process.

RegCure Pro 2

4). After installation, run the RegCure Pro to start.

RegCure Pro icon

5). Scan your computer for errors by making a system scan.


6).After scanning, choose the items you want to clean and fix them.


Guide 2: Automatically Remove PUP.Optional.InstallCore.A with SpyHunter

SpyHunter is an adaptive real-time anti-malware/spyware certified by West Coast Labs’ Checkmark Certification System and designed to assist the average computer user in protecting their PC from malicious threats.You can remove PUP.Optional.InstallCore.A and related extensions with this powerful tool. Please read the instruction below.

(Please be at ease for SpyHunter, since it will never bundle with any programs and it can get along with existing security programs without any conflicts.)

1). Click the download button below.


2). After finishing downloading, click Run to install SpyHunter step by step.


3). After finishing installing, SpyHunter will scan and diagnose your entire system automatically.


4). As the scanning is complete, all detected threats will be listed out. Then, you can click on “Fix Threats” to remove all of the threats found in your system.

spyhunter malware scan

Final Tips:

PUP.Optional.InstallCore.A is a high level risk PUP that will do harm to your system. It is high time to remove it from your PC. If you need a quicker and safer way out of PUP.Optional.InstallCore.A , please feel free to Download and Install Powerful Security Tool Here.

To make your computer safer, you can download and install RegCure Pro to ensure dual protection.

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