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There seem to be a lot of controversy on whether a Russian made software piece called Software Informer is malware/adware or not. http://aroundsap.blogspot.com/2007/08/remove-software-informer-system.html
I believe it is an adware and must be avoided - like anything associated with RBN. If you search for software updates, you often run into links poisoned by their ads like this
"IP range (220.127.116.11/24) from files.informer.com (IP = 18.104.22.168) is in the RBN block rules.
The domains in this range are not trustworthy
MScan results and malware references:
File siinst.exe received on 2009.12.14 23:41:57 (UTC)
Result: 0/40 (0.00%)
File size: 744538 bytes
MD5 : f81ccc88fe9c73d54a3bbc72e760265b
There are multiple references online calling it adware and spyware.