From what I know, this is a strange programme which can be uninstalled only by downloading a SPECIFIC, SEPARATE uninstaller from the computerhelp/ manufacturer website. But there doesnt seem to be any available download link.
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Also, manually remove any left over folders. I believe this software completely rewrites the hosts file. Check what your hosts file says (C:\windows\system32\drivers
\etc\hosts) by opening it in notepad. You can also try removing the entry for the website being blocked, then save the hosts file.