Remove Word Highlight Extension - Get Rid of Word Highlight Ads Permanently

Within the past few days, I believe: In Slimjet browser, an extension called "Word Highlight" ("W") appeared on the toolbar and shows itself as "installed by enterprise policy." Uninstall is blocked and I've tried a number of methods suggested on Slimjet's forum. I'm very careful about excluding adware, etc., in program installs and haven't installed anything recently that hasn't been well vetted. The registration code for Word Highlight is "ooabkmkhabkahcjbgpiajffckeibpdoa."

What is Word Highlight?

What is Word Highlight? How can this infection get into the computer? How to blocking the ads and remove Word Highlight related contents from the computer completely？