I want to lock my computer and have to use a password to get into it How do you lock it?

Answer 1

in users accounts put the password for the administrator. and erase the others accounts.
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Answer 2

hold down CRT ALT Delete

Click "lock computer" if your computer provides that feature, and set your password.

Answer 3

If you're using Windows, press Windows-L

Answer 4

I don't use to lock my computer because my bro also use it and other family members also have some use of it, I only secure my personal and private data which I don't want that my family should have a look at it, I use Folder Lock to secure my data, Instead of locking my who computer I only lock my personal and important data, you can download it fro here as I did,

http://www.newsoftwares.net/folderlock