Hello experts,
How can I do a password for my PC so no one can use it.
Thanks in advance

That's an operating system issue.
Are you using WindowsXP by chance?
If so, go to Control Panel > Users, and designate a password there.

Hello experts,
How can I do a password for my PC so no one can use it.
Thanks in advance

Please don't cross post. Your question is answered in the Computers For Beginners topic.

Hi,
Another way to set a password is through the BIOS.
You can do it by following the steps below.
But, DO NOT FORGET THE PASSWORD...

The following is step-by-step for entering the computer's CMOS/BIOS computer settings.
Newer computers use the F1, or either F2, or either Delete, or either the Esc key. After re-boot or startup, immediately press down one of these keys, hold down for about 2 seconds, release, they press down for 2 seconds. Continue until it either goes into the settings window, or boots to windows.
If it boots to windows, then shutdown or restart, and try the same thing with one of the other keys.
Older computers use a combination of keys, such as Ctrl Alt Esc, (holding down all three keys at the same time), or Ctrl Alt Shift, or Ctrl Alt Delete.
A Del computer uses DEL key.

After you get to the settings screen, the right hand side of the screen gives instructions on how to navigate around,; such as "the arrow keys" move up and down, or right and left. Esc key takes you back a step back. etc.

To set a password: Use the arrow keys to scroll to the Security menu at top.
Then, set a password (DON'T FORGET IT).
After finishing, just press Esc, and following the directions to either "Save" or "Cancel" (without saving), returning to the normal booting-up process.

Best wishes,
fredg

Thanks for the good answer