našel jsem řešení na netu, jdu ho zkusit: postuju

I worked on 12 systems with this error on multiple networks

"Failure to display security and shut down options. The logon process was unable to display security and logon options when CTRL+ALT+DELETE was pressed"

I reloaded several systems only to have it reappear leading me to beleive it was a virus

over a period of a week, I found 6 PC's had a virus called Trojan.ADH and or Trojan-Download.Murlo, the other 6 PC's showed no signs of any virus.

All 12 happened to be running .Net applications

Even after removing the viruses all of the systems continued to lockup after 5 to 10 minutes of use.

The fix turned out to be quite simple and... anything but simple to troubleshoot (Assuming the systems were virus free)

Reset Winsock!

All returned to normal status after resetting the Winsock

To reset Winsock do the following

1. Right click on Command Prompt and RUN AS ADMINISTRATOR

2. Type "netsh winsock reset" and click Enter Key

3. You should see a message that the Winsock was reset, reboot for changes to take effect.

Restart

This worked on all 12 systems no return calls over 1 month now.

Good luck