Chrome Extensions removal

Helpful links
http://malwaretips.com/blogs/this-extension-is-managed-and-cannot-be-removed-or-disabled-removal/

In the Extensions tab, to find the ID of the “This extension is managed and cannot be removed or disabled” malicious extension, enable the “Developer mode” by putting a check-mark in its box as seen below.
Next, you we will need to write down the ID and the name of the “This extension is managed and cannot be removed or disabled” malicious extension, then we can close Google Chrome

Then use Regedit...
Then  use chrome://policy/
Click Show Value
"see below there’s a path on your computer pointing to an extension update file"
Next:

C:\Users\Your-Username\AppData\Local\GOOGLE\CHROME\USER DATA\DEFAULT\Extensions)

The writeup above suggests:
5. Finally, we will need to browse to %windir%\system32\GroupPolicy\ (e.g. C:\Windows\system32\GroupPolicy), and from there delete the Machine and User folders.

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http://forums.anvisoft.com/viewtopic-47-6135-0.html

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http://superuser.com/questions/451129/is-it-possible-to-reset-all-google-chrome-extension-settings