it depends which blackice it is. Theres an antivirus black ice. then theres a virus called black ice.
It seems like that laptop has way to many things on it for antivirus. Are any of them paid subscriptions? If not I suggest removing all of them. I think you have a virus and some malware.
What version of windows are you running?
You said the laptop used to be a corporate laptop. So is it no longer and just for personal use? If so, I would recommended just wipping the hard drive totally and reinstall windows after you backup whatever files you have on it.
If you cant wipe the hard drive. Then you may want to try the following.
1. Uninstall all anti viruses and malware programs except one.
2. Check your Add/Remove programs for anything suspicious and remove them. Anything such as my search assistant or coupons, or viewpoint.
3. I suggest installing cc-cleaner as well and removal all temp files and cookies.
4. Enable your computer to view hidden system files and folders. Google on how to do that with version of windows if you dont know how.
4. Download this special super anti spyware portable version.
http://www.superantispyware.com/portablescanner.html
5. Run a full system scan and see if it catches anything. Remove the infected files and then reboot.
I think you have a virus as a normal proxy setting set could be it.
Also since it was a corporate computer thats why i suggest wiping the hard drive to get rid of any type of restrictions or file permissions that it may have.