I've long been using the same AT command to shutdown a PC after an after-hours backup, but it stopped working about 2 weeks ago. As a test I tried entering the following in a command window as user Administrator: at 19:15 /every:tuesday dir I kept the window open until after 19:15. Nothing happened. I even tried various permutations such as "at 19:15 dir" -- same result. System info: OS Name Microsoft Windows 7 Home Premium Version 6.1.7601 Service Pack 1 Build 7601 Processor Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz, 2933 Mhz, 2 Core(s), 2 Logical Processor(s) Installed Physical Memory (RAM) 4.00 GB Time Zone Coordinated Universal Time Ideas, comments, help would be appreciated.