What is Instant Search Widget Virus

My computer is infected by Instant Search Widget. MSE gives me the virus infection warning when I try to install a music program which is downloaded from the Internet, however, the anti-virus programs don’t have enough power to get rid of it. How can I remove this virus completely? Any help will be appreciated.

Definition of Instant Search Widget Virus:
Instant Search Widget is a malicious Rootkit Trojan virus that endangers a target computer terribly. The Trojan infection is released by cyber criminals to target worldwide computers. Usually, users have unfortunately suffered from this Trojan attack when you visit doubtful websites, open junk email attachments and download free software from affected web pages. After the rootkit virus targets the computer, it will install itself automatically and run as a background program. Such a Trojan infection takes over your whole system to change your system files and registry entries in an effort to invade your computer badly. Once corrupted, the computer will result in slow system speed, poor network connection and disabled executable programs etc. Normal programs of the target computer are also damaged to perform normal functions, particularly your anti-virus software. In fact, this Trojan comes bundled with many potential threats like malware and adware, which attempts to invade the computer deeply. To regain a clean computer, use
rs should take actions to get rid of the rootkit Trojan entirely.

The Trojan attack does not only affect the contaminated system but also interrupts your online activities badly. It may modify desktop image, browser homepage and other default computer settings to make chaos. During your web browsing activities, the Trojan infection is capable to cause redirect issue. It may typically redirect your Internet search results to other malicious web pages, making you very annoyed. Meanwhile, numerous pop-up ads will appear on the screen, luring users into downloading freeware and purchasing unwanted products. With the help of this Trojan infection, some unknown ads-on, plug-ins and extensions can take chance to install in the computer secretly. The risk of the Trojan virus remains in its ability to collect important data for cyber hackers to gain profits illegally. Thus, the Trojan virus must be removed from the computer immediately.