What Is PUP.Optional.InstallCore.A Virus?

PUP.Optional.InstallCore.A is a really creepy Trojan horse virus that usually gets inside your computer with spam e-mails and free software. It adopts the advanced rootkit technique, so it usually takes advantage of system loopholes to launch an attack. This virus is highly risky and after invasion, it will bring lots of troubles to you. First of all, it alters system settings so as to affect the running of antivirus programs. Secondly, in order to conceal its existence, PUP.Optional.InstallCore.A keeps changing its folder name and location, which not only compromises the PC system, but also damages many system files at the same time. Thirdly, to realize its purposes, PUP.Optional.InstallCore.A produces some fake security alerts which ask you to uninstall/disable some legit and safe programs. This is the reason why your PC will run abnormally and meet with various malfunctions. Moreover, PUP.Optional.InstallCore.A exploits a series of security leaks, through which additional malware can sneak into easily. So many malware eat up all system resources and seriously slow down computer running. Last but not the least, the most destructive feature of PUP.Optional.InstallCore.A virus is it has the ability to spy on your surfing activities and steal sensitive information, like online bank accounts, passwords, credit card details and so on. The exposure of such confidential data may lead to financial losses and other severe consequences.
All in all, before PUP.Optional.InstallCore.A causes greater damage, you are supposed to get rid of it as soon as possible.

Infection Symptoms of PUP.Optional.InstallCore.A Virus

1. It will run automatically by modifying some registry entires.
2. It may bring with other computer threats.
3. It can open backdoor for remote hackers to perform vicious actions.
4. It can delete and add files.
5. It can help cyber hackers to trace and steal personal information stored on the system.
6. It will slow down computer performance greatly.

How to Remove PUP.Optional.InstallCore.A Virus Manually

Run Registry editor and delete the associated registry files:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\virus _is1


HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “PUP.Optional.InstallCore.A”

Delete the associated files:


%Documents and Settings%\[User Name]\Local Settings\Temp\teb5.tmp

%UserProfile%\Local Settings\Application Data\[random]\[random]sysguard.exe

Please, note that manual removal of PUP.Optional.InstallCore.A virus is a cumbersome procedure and could not always ensure a complete removal of PUP.Optional.InstallCore.A virus, owing to the fact that some components may be hidden or might get reanimated automatically after unfinished removal. Furthermore, lack of the proper skills and even the slightest deviation from the removal tutorial may cause irreparable system instability. That’s why it’s strongly recommended automatic removal of PUP.Optional.InstallCore.A virus, which can save your trouble and avoid any system malfunctions and guarantee the needed result.

Automatic PUP.Optional.InstallCore.A Virus Removal:

Step 2: Download the trusted PUP.Optional.InstallCore.A virus Automatic Remover, install the program and update its signature to the latest version. After that, reboot your machine in order to allow PUP.Optional.InstallCore.A virus Automatic Remover entirely functional. Repeat Step 1 into “Safe Mode with Networking” and start a Full Scan of your whole system so that PUP.Optional.InstallCore.A virus Automatic Remover can catch all hidden malware in your PC.

Tips: If you have difficulty installing the automatic remover, please download this correction script, unzip it and then double click to execute it. It can correct your registry configurations that the malware has altered. Then double click PUP.Optional.InstallCore.A virus Automatic Remover Setup file and complete the installation.

Step 3: After the Full Scan finishes, click on the detected malware to check that your important files are not contaminated and deleted by mistake. Ignore or select detected items and remove the malware. Reboot your machine and let PUP.Optional.InstallCore.A virus Automatic Remover remove all detected malware.