My laptop (Lenovo T400) was infected with OpenCloud AV two days ago. After using several anti-virus programs (e.g. Windows' security essentials, MBAM, etc), I was able to get rid of the surface problem of the virus, i.e. no more pop-ups. But I could no longer start any of the anti-virus services on my computer, such as MBAM, McAfee On-Access Virus scan, etc. I got the same message, "Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item."
After searching on the Internet, I came across a post on this forum, specific to OpenCloud AV. I followed the same steps given there -- I downloaded and ran the following three programs, tdsskiller, dds, and combofix. (Sorry, now I know that I should have waited on the last one.) These programs discovered and fixed some issues. However, the "denial of access" problem still exists. and whenever I click on a folder, a pop-up window shows up trying to install Roxio Business Edition. I'm attaching the logs with this post. (The dds's log was from a second run, since I didn't save it the first time.) I also ran GMER, and the log seems to show there are quite a few suspicious rootkits. I can't attach the log with this post, since it's over the quota. When you need, I'll send it separately.
Thanks for your help!