Remove PUP.Optional.StartPage by performing the procedure as outlined on this post. You will need a range of removal tool to effectively get rid of the adware and return your home page to its default settings.
PUP.Optional.StartPage is detection by Malwarebytes Anti-malware and other security software to identify an adware that modifies Internet browser’s home page. This detection covers various adware that has a tendency to override the home page with search engine or any kind of page that is not set by the user.
PUP.Optional.StartPage may present itself as valid program to trick computer users. In some instances, this adware are bundled with freeware that are offered on popular web sites. Installing the program also loads PUP.Optional.StartPage in a form of add-on or extension. Google Chrome, Internet Explorer, and Mozilla Firefox are the main target of this threat.
When the adware is run on the computer, it changes the home page to what was configured by PUP.Optional.StartPage. Normally home page is replaced with a custom search engine that shows mix results and ads. Authors intend to gain profit via displayed ads from its affiliate partners. Pay-per-click campaign (PPC) is employed in most home page hijacker such as PUP.Optional.StartPage.
Do not hesitate to remove this threat once spotted on the computer. It is as risky as other viruses and malware though it has different payload. For complete removal guide, please see the section on this page. It contains procedures as well as free tools that you may use to scan the computer and get rid of this pest in no time.
How to Remove PUP.Optional.StartPage
Step 1 : Download Microsoft Safety Scanner and Run a Scan
If you have previous version of Microsoft Safety Scanner that is more than 10 days old, please disregard it. Download a new copy from the official web site. Every 10 days, Microsoft will release the latest edition of this tool with updated anti-virus definitions to ensure that it will detect even most recent malware threats.
1. Download Microsoft Safety Scanner by clicking the button below and save it on your desktop. This is a free tool from Microsoft that offers on-demand scanning. It helps remove computer infection such as malware, virus, and Trojan.
2. Restart Windows in Safe Mode.
-Turn off the computer. Then turn the power on, immediately press F8 on your keyboard right after a text appears on the screen.
-It will display a selection. Please choose Safe Mode and press Enter. Most threats like PUP.Optional.StartPage will not load when you run Windows in this mode.
3. Once Windows starts in Safe Mode, locate the file of Microsoft Safety Scanner (msert.exe) that you have downloaded earlier. Double-click to run the file.
4. When it shows End user license agreement, please accept and click Next to continue.
5. On Scan Type window, please select Full scan. The tool will scan the entire system. This is ideal to detect and remove all threats that are present on the computer.
6. Click Next to begin the scan. This process will take a while to finish. Please be patient and let MSS complete the scan procedure.
7. Once the scan operation ends, it will provide a report for identified threats. Please remove all the threats.
8. Reboot the computer and run another scan after Windows boots normally to make sure that Trojan:Win32/Sirefef.AN is gone. You may now restart Windows normally.
Step 2 : Double-check for Remnants of PUP.Optional.StartPage using Malwarebytes Anti-Malware
This guide requires a tool called Malwarebytes' Anti-Malware. It is a free tool designed to eradicate various computer infections including PUP.Optional.StartPage. MBAM scanner and malware removal tool is distributed for free.
1. In order to completely remove PUP.Optional.StartPage, it is best to download and run the recommended tool. Please click the button below to begin download.
2. After downloading, double-click on the file to install the application. If you are using Windows Vista or Windows 7, right-click on the file and select 'Run as administator' from the list.
3. When User Account Control prompts, please click Yes to proceed with the installation.
4. Follow the prompts and install as 'default' only. There are no changes needed during the installation process.
5. Before the installation procedure ends, MalwareBytes Anti-Malware will ask for database update, please proceed.
6. Click Finish button after installation. Program will run automatically run and you will be prompted to update if newer version of database is available.
7. At this moment, close MalwareBytes Anti-Malware and proceed with the next step.
Run a thorough scan in Safe Mode to remove PUP.Optional.StartPage
8. Remove all media such as floppy drive, cd, dvd, and USB devices. Then, restart the computer.
9. Before Windows begins to load, press F8 on your keyboard.
10. It will display the Advanced Boot Options menu. Select Safe Mode.
11. Windows will now start in Safe Mode. It runs on minimal set of drivers so expect your desktop to load a low-resolution display.
12. Once Windows is running on Safe Mode, find the icon of MalwareBytes Anti-Malware. Double-click to launch the program.
13. Choose Perform full scan on scanner's console to ensure that it thoroughly check the PC for any presence of PUP.Optional.StartPage and other forms of threats. Click the Scan button to start.
14. Once the scan has completed, Malwarebytes Anti-Malware will issue a list of identified threats. Mark all threats and click on Remove Selected.
15. If it prompts to restart the computer, please reboot Windows normally.
Alternative Removal Procedures for PUP.Optional.StartPage
Use Windows System Restore to return Windows to previous state
During an infection, PUP.Optional.StartPage drops various files and registry entries. The threat intentionally hides system files by setting options in the registry. With these rigid changes, the best solution is to return Windows to previous working state is through System Restore.
To verify if System Restore is active on your computer, please follow the instructions below to access this feature.
How to Access System Restore on Windows XP, Windows Vista, and Windows 7
a) Go to Start Menu, then under 'Run' or 'Search Program and Files' field, type rstrui.
b) Then, press Enter on the keyboard to open System Restore Settings.
How to Open System Restore on Windows 8
a) Hover your mouse cursor to the lower left corner of the screen and wait for the Start icon to appear.
b) Right-click on the icon and select Run from the list. This will open a Run dialog box.
c) Type rstrui on the 'Open' field and click on OK to initiate the command.
If previous restore point is saved, you may proceed with Windows System Restore. Click here to see the full procedure.
Ways to Prevent PUP.Optional.StartPage Infection
Take the following steps to protect the computer from threats. Suggested tools and security setup within installed software helps prevent the same attack on your PC.