I kept receiving pop-up ads while I was browsing Internet and for some reasons my laptop run slower than before. I run malwarebytes and it picked up this PUP.Optional.ExpressInstall.A and quarantined it. However, when I restarted my computer, another PUP virus will appear. I knew the virus still inside my computer but I cannot get rid of it completely. I run other security check and nothing found. How do I get rid of it without coming back?
PUP.Optional.ExpressInstall.A is a malicious threat that can be regarded as a potentially unwanted program and detected by Malwarebytes Anti-Malware. It gets installed without any permission and then it can keep performing bad behavior on your computer to interrupt your browsing activities. Generally speaking, it comes after you install a freeware software like video recording/streaming, download-managers or PDF creators. This unwanted threat is bundled into this program or software to get access to your computer. Usually it won’t come alone, it always comes along with other threats such as PUP.Optional.Toolbarwid or PUP.Optional.NetLiker.A. When it is installed, it may be used to track user’s web browsing habits, record addresses of visited sites and send collected data to a remote server.
Being as a fatal threat, this parasite can compromise your system and may introduce additional infections Ransomware or like rogue software to install on the infected machine. Once it gains an access, it will apply an advance technique that aims to conceal itself and evades anti-virus detection. Thus, most security product are not able to detect this threats. PUP.Optional.ExpressInstall.A virus can be detected by Malwarebytes Anti-Malware, however, the removal is really a headache for PC users because this virus can keep coming back. The first thing it will do on your computer is to drop huge amount of junk files into the infected computer to occupy system resource. So you will find computer extremely slow and sluggish. It takes longer than usual to do anything during your browsing session. In addition, it may take over the affected web browser and lead to annoying redirects to doubtful websites. You may find that constant pop-up ads displayed on the screen randomly, asking you to click and get coupon or install add-ons or plug-ins. Sometimes a toolbar will be added on your browser and will not allow you to delete it. Everything on your computer will be fully messed up once your computer has been infected with such kind of threats. It may freeze or crash your computer randomly since this virus is able to mess up your system files once it is installed. Therefore, don’t hesitate to get rid of PUP.Optional.ExpressInstall.A virus once it is found.
It can bypass the legit security tools and destroy your computer secretly.
It prevents you from opening some application because the files are corrupted.
It can make your browser redirected to all kinds of malicious websites.
It is able to allow remote hacker access the compromised system for illicit purpose.
From malicious drive-by-download scripts from corrupted porn and shareware / freeware websites.
Through spam email attachments, media downloads and social networks.
When clicking suspicious pop-ups or malicious links.
Open unknown email or download media files that contain the activation code of the virus.
Note: No matter how does the virus access your PC, users should know that there are no tools can remove this pesky Trojan automatically at this moment, it is suggested users not spend much time in downloading or paying any security software which claims can delete this stubborn virus. It is totally useless. To completely get rid of PUP.Optional.ExpressInstall.A virus, professional manual guide is needed.
Currently many computer users had the same experience that this virus couldn’t be removed by any anti-virus applications. So the manual approach is always required to combat this virus. And here is the step-by-step removal guide for all computer users.
1. End the malicious process from Task Manager.
Once PUP.Optional.ExpressInstall.A virus is installed, computer user may notice that CPU usage randomly jumps to 100 percent. At any time Windows always has many running processes. A process is an individual task that the computer runs. In general, the more processes, the more work the computer has to do and the slower it will run. If your system’s CPU spike is constant and remain at a constant 90-95%, users should check from Task Manager and see if there is a suspicious process occupying system resources and then end it immediately.
(The name of the virus process can be random.)
Press Ctrl+Shift+Esc to quickly bring up Task Manager Window：
2. Show hidden files and folders.
Open Folder Options by clicking the Start button, clicking Control Panel, clicking Appearance and Personalization, and then clicking Folder Options.
Click the View tab.
Under Advanced settings, click Show hidden files and folders, uncheck Hide protected operating system files (Recommended) and then click OK.
3. Open Registry entries. Find out the malicious files and entries and then delete all.
Attention: Always be sure to back up your PC before making any changes.
a. Press Windows key + R to open Run box. In the “Open” field, type “regedit” and click the “OK” button.
Then a Registry Editor window will pop up as the following picture shows:
b. Search malicious files and registry entries related to PUP.Optional.ExpressInstall.A Virus and then remove all of them:
%AllUsersProfile%\[random]
%AppData%\Roaming\Microsoft\Windows\Templates\[random]
%AllUsersProfile%\Application Data\.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\[random]
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Temp
PUP.Optional.ExpressInstall.A Virus is a serious threat that can damage your computer because it could corrupt the targeted Internet browser and change your browser settings to modify your homepage as well as block you from accessing any website you want. Also it may enable attackers to gain remote unauthorized access and control over the affected computer system. It acts aggressively on your computer once it’s fully activated on the system. You will find that lots of pop-up advertisement windows uninterruptedly shown on the computer screen and the worse is you cannot close them at all unless you click on the pop-up box first, so you will be redirected to commercial web pages again and again even though you don’t want to. Currently many computer users had the same experience that they have tried a sea of antivirus software recommended online but still end up with frustration because antivirus software are not helpful to remove PUP.Optional.ExpressInstall.A completely. If you want to delete this unwelcome thing from your computer completely, you have to uninstall all the programs that related to this virus first, and then remove this virus manually to make sure all the files and registry entries are deleted permanently.
Note: If you are not knowledgeable enough to be able to distinguish the location of this virus, or you are afraid of making mistake during the manual removal, please contact experts from Yoocare Online Tech Support for further help.
Published by & last updated on January 6, 2014 6:11 am
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