I have a desktop XP machine that tells me I do not have access when I hit ctrl-alt-del. I am the administrator/only account, but I don't know how to restore this function. Help.

device manager or task manager? by the way I give you a tips to enable and disable task manager.
1) go to run> regedit
2) HKEY_CURRENT_USER\software\Microsoft\windows\currentversion\policies\system
3) disabletaskmanager > REG_DWORD
4) value = 1 for enable and value = 0 for disable

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.