Pup.optional.defaulttab

Pup.optional.defaulttab, otherwise known as DefaultTab or Default Tab is a potentially unwanted program, which changes browser settings on the hijacked Internet browser. Pup.optional.defaulttab substitutes the default homepage or search provider with some advertising website, or modifies the default tab of the compromised Internet browser any time the computer user attempts to open a blank page, with some deceitful commercial website. Pup.optional.defaulttab incorporates adware, installs toolbars or has other uncertain purposes. Technically, Pup.optional.defaulttab is not a virus, but it encompasses a variety of damaging traits, such as rootkit functionalities to conceal itself deeply into the affected PC, browser hijacking and, generally, just interfering with the computer user's experience. Pup.optional.defaulttab uses blackhat SEO to boost traffic of the website and make a profit from click fraud. Pup.optional.defaulttab can access the targeted computer packed with freeware and shareware applications (download-managers,video recording/streaming or PDF creators). Pup.optional.defaulttab is also packed within the custom installer on many download websites, such as CNET, Brothersoft or Softonic, so if the web user has downloaded a software product from these websites, he/she might also installed Pup.optional.defaulttab throughout the setup process of the software product.

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Security Doesn't Let You Download SpyHunter or Access the Internet?


Solutions: Your computer may have malware hiding in memory that prevents any program, including SpyHunter, from executing on your computer. Follow to download SpyHunter and gain access to the Internet:
  • Use an alternative browser. Malware may disable your browser. If you're using IE, for example, and having problems downloading SpyHunter, you should open Firefox, Chrome or Safari browser instead.
  • Use a removable media. Download SpyHunter on another clean computer, burn it to a USB flash drive, DVD/CD, or any preferred removable media, then install it on your infected computer and run SpyHunter's malware scanner.
  • Start Windows in Safe Mode. If you can not access your Window's desktop, reboot your computer in 'Safe Mode with Networking' and install SpyHunter in Safe Mode.
  • IE Users: Disable proxy server for Internet Explorer to browse the web with Internet Explorer or update your anti-spyware program. Malware modifies your Windows settings to use a proxy server to prevent you from browsing the web with IE.

If you still can't install SpyHunter? View other possible causes of installation issues.

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