Resolution - Restart Windows
Description - In the middle of a presentation, I suddenly cannot select cells in an excel file or type any keys. The behavior of the clicks and key shortcuts mimics that if the CTRL key was held down.
Troubleshooting - I tried hitting the CTRL key once, twice, and several times (and occasionally hitting it harder even though that has never solved any technical problems except to vent some "extra" energy). I did the same thing with the ALT, Windows, Shift keys, and several combinations of those buttons without success.
I also tried the ESC, bashing my keyboard, and clicking all the buttons to my mouse. Last before rebooting my system, I tried closing all my applications. None of the attempts changed any behaviors; the behavior was that the CTRL was always down whether the any of the buttons above were pressed, held down, or not used.
Frequency of issue - This is the first time that I have ran into this on this system and Windows 7. I have ran into something similar to this before on other systems (none Windows 7) which pressing the CTRL key typically solved the problem.
Analysis - Earlier I did have an issue with screen capture. After closing one of my spreadsheets, a message came up that there were not enough resources to display all data. I also just installed the SharePoint Designer yesterday. I do leave my system running for several days (probably over two weeks since the last reboot).
Post-Analysis - I read online that there are Windows features and applications as potential causes, but I disable those features and do not have any applications that modify the keyboard functionality.
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