Logon

In the Logon category, you toggle Autoexec.bat parsing by setting the REG_SZ value ParseAutoexec in the key HKCU\Software\Microsoft\Windows NT\CurrentVersion \Winlogon to 0 or 1. Set ParseAutoexec to 0 to prevent Windows XP from parsing Autoexec.bat for environment variables. Otherwise, set ParseAutoexec to 1, and Windows XP will parse it for environment variables.

Autologon

The last useful category in Tweak UI is Autologon, and it enables you to automatically log on to Windows XP without providing your name, domain, or password. Table 5-27 describes the values you must set to log on to the computer automatically. Name is the user name, and Domain is the domain name. To enable Autologon, you must set the REG_SZ value AutoAdminLogon to 1. Last, set the value REG_SZ value DefaultPassword in the subkey Winlogon to the password you want to use to automatically log on to the computer. You don't see this value in Tweak UI because it stores the password differently.

Table 5-27: Values in Autologon

Setting	Name	Type	Data
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Log on automatically at system startup	AutoAdminLogon	REG_SZ	0 | 1
User name	DefaultUserName	REG_SZ	Name
Domain	DefaultDomainName	REG_SZ	Domain

Note 

This setting is useful for IT professionals deploying software. It's one way to install applications that require administrative access to the computer, which users in most enterprises don't have. Chapter 15, "Working Around IT Problems," discusses this setting in detail.