We are running 6.01.04.

Since yesterday, on two different computers in our office (one XP Pro, other Win 7 Pro), after login, the nav menu disappears and we are unable to edit any content. All of the Manage Buttons do not respond. Also, you cannot switch from Edit to View or Layout. 

Once logged in, only the Admin button responds on the menu at the top (Admin Host Modules Pages Tools)

Interestingly, we are able to log in and edit content without incident on several other computers in the office and from elsewhere.

I'm wondering if a recent microsoft update is conflicting with DNN. Any thoughts

I deleted cookies, temp Internet files, etc. Cleared browser cache. Set browser security settings to default. Upgraded Java. Upgraded DNN to 6.01.5. Ran Malware scan. Ran CCCleaner. All to no avail.

This problem occurs in IE, Firefox, Chrome and Safari.

Yes. I created a test page on our web site using the Dark Knight Skin and Container and the same issue occurs.

What really baffles me is that this issue only occuring on cetain computers and with all browsers. I have no trouble logging in and editing from my laptop, Ipad and at least two other computer in my office.