how to remove downloader-kl ??

Couple things you can try, any one should work Luckily, its a low risk trojan:

http://hq.mcafeeasap.com/dispVirus.asp?virus_k=126091
http://vil.nai.com/vil/content/v_126091.htm

This downloader trojan is intended to download and execute remote file(s). The URL to the remote file(s) is stored in the resources of the downloader.

When executed the trojan attempts to download the remote file via HTTP. Testing thus far suggests that the method this trojan uses for the download may well bypass any personal firewall software - the HTTP traffic is associated with SERVICES.EXE (legitimate system process, typically granted DNS incoming/outgoing in most personal firewall configurations).

Administrators should block HTTP access to the following domain:

static.callinghome.biz
At the time of writing, the remote content was an installer for Adware-Searchcentrix application .

 

http://www.majorgeeks.com/vb/showthread.php?t=25959