The following are some common problems encountered during the use of Win2008 and their corresponding solutions, which I would like to share with everyone for research. Corrections and supplements are also welcome. (roebin) 1. How to turn off UAC? Control Panel → User Accounts → Turn User Account Control on or off → Uncheck "Use User Account Control (UAC) to help protect your computer." 2. How to disable pressing CTRL ALT DEL to log in at startup? Control Panel → Administrative Tools → Local Security Policy → Local Policies → Security Options → Interactive logon: Do not require CTRL ALT DEL → Enable.