I suspect that keyboard.exe could be a rogue keylogger that did not have a known signature?
upload suspicious file(s) to www.virustotal.com and test with 43 malware scanners when you have the result, copy the url in the address bar and post it here for us to see

alternatives
Jottis malware scan http://virusscan.jotti.org/
VirSCAN http://virscan.org/