Strange items deletion in various applications as if the Delete key being pressed.

Question

I work with a T420 laptop docked in a docking station.
The following strange phenomenon is happaning:
Occasionally, Items are being deleted or attempt to be deleted in various applications as if the Delete key is being pressed constantly.
Examples:
1. The Outlook window is open, left mouse click on the Inbox folder results in all emails being deleted.
2. Explorer window is open, left mouse click on one of the files or folder results in attemp to delete the file or folder. Clicking 'NO' results in an endless loop of attempt to delete.
3. Google window is open (IE), clicking on one of the letters in the search box, results in this letter being deleted.
4. Open Task manager, results in attempt to delete the first task in row.
When docked out the laptop from its station, this strange behavior stopped.
Needles to say, that I replaced the external keyboard and the docking station itself, but it did not help.
HAS ANYONE ENCOUNTERED SUCH A PROBLEM? What do I do?!

Answer 1

I am having a similar issue that I can consistently recreate. I was finding that emails were "randomly" getting deleted from various folders. It was driving me crazy! I keep my Outlook inbox fairly well organized in that I keep emails in there if they require further action. I don't keep my Deleted folder organized however, so I was getting chunks of emails going from my Inbox to my Deleted items folder and it became very difficult to find all of the deleted emails that I still needed to action..... Here is how I can recreate this:
Laptop is off of the docking station and open. Outlook has focus with an email highlighted in my inbox. I close the lid and place the laptop onto the docking station. The email that had focus is now in the deleted folder. Again, I can recreate this virtually every time. Please help!