For the first time ever upon starting up Windows 7, explorer.exe is attempting to communicate with ocsp.usertrust.com (184.108.40.206). A bit of digging reveals that this address seems to be registered to Comodo - however I don't use the Comodo firewall, but rather Eset's. Going to the IP address in a browser triggers a file download which is worrisome. Does anyone have any experience with what this might be? In the meantime, I'm going to temporarily deny it. Thanks!