TR/Sirefef.A.61 exploits imperfections of browsing software. In particular, it excels in exploiting errors in Internet Explorer, often succeeds to exploit the same vulnerability many times.
In the wild, user Ara 1973 wrote the virus had been found in Recycle Bin, and then quarantined, but, once Internet Explorer started loading pages, the infection was reported again. That is a good practical illustration to the above trait of the trojan.
Removal of TR/Sirefef.A.61 is to include a treatment for browsing software so that the infection would not repeat its invasion over time. Download reliable anti-malware and examine your PC to remove TR/Sirefef.A.61 for good.

TR/Sirefef.A.61 malware details:

Malware details:	TR/Sirefef.A.61 Uninstaller
Threat type: Trojan horse, Malware Threat version:2011 Country (state) of origin:Russia, EU Risk: Extreme

Signs of TR/Sirefef.A.61 virus infection:

Once you have noted any strange changes in your computer system behavior, it might be the infection’s impact. This threat intentionally customizes system settings and adds new values to the system registry. Such measures allow it launching automatically as your system is warming up.

There may be no direct signs of the threat. Therefore, as soon as you have any ground to suspect the infection introduction, check whether your apprehensions were true launching free scan in order to detect and remove TR/Sirefef.A.61, as well as other detected parasites.

TR/Sirefef.A.61 automatical removal:

Contemporary malware has a habit of acting in groups. The threat considered in this post may have several threats assisting it and may be used as assistant to other infections, which is why complex malware removal is the best way to get rid of TR/Sirefef.A.61. In addition, if you remove it automatically, your PC will get a life-time armor against future malware introductions.