0) Do you have electricity? - if not have you been disconnected, is there a power cut?
1) Have you turned your computer on? - if not, why isn't it switched on?
2) Is the monitor turned on as well? - if not, why isn't it switched on?
3) Have you connected computer to the monitor? - if not, why isn't it connected to the computer? - if not, why isn't it connected to the computer?
4) Have you connected computer to the keyboard? - if not, why isn't it connected to the computer?
5) Have you connected computer to a mouse?
6) Is the computer connected to the internet?
7) Can you get to the site? - if you can't what do you see?
Assume can get to the site
8) Can you see the 'Sign up' button? - if you can't what do you see?
Assume can see the 'Sign up' button
9) Are you able to move the mouse to point at the 'Sign up' button - if not, what happens? Does the mouse work at all?
Assume can point at the 'Sign up' button
10) Are you able to click the left (right if buttons reversed) mouse button on the 'Sign up' button? - if not, what happens? Can you click on anything? Does the mouse work at all?
Assume can click on the 'Sign up' button
11) Do you see a page saying "Join xHamster for free"? - if you can't what do you see?
12) Can you see a text input field with 'Username *' ? - if you can't what do you see?
13) Can you see a text input field with 'Email *' ? - if you can't what do you see?
14) Can you see a text input field with 'Password *' ? - if you can't what do you see?
Assume the mouse is still working
15) Can you point and click the left (right if buttons reversed) mouse button on the 'Username *' text input field?
Assume can click the 'Username *' text input field
16) Can you type a username in the 'Username *' text input field? - if not, what happens? Does the keyboard work at all?
Assume can enter a Username.
17) Can you point and click the left (right if buttons reversed) mouse button on the 'Email *' text input field?
Assume can click the 'Email *' text input field
18) Can you type a username in the 'Email *' text input field? - if not, what happens? Does the keyboard work at all?
Assume can enter a Email.
19) Can you point and click the left (right if buttons reversed) mouse button on the 'Password *' text input field?
Assume can click the 'Password *' text input field
20) Can you type a username in the 'Password *' text input field? - if not, what happens? Does the keyboard work at all?
Assume can enter a Password.
21) Can you see the 'Sign up for free' button? - if you can't what do you see?
Assume can see the 'Sign up for free' button
22) Can you point and click the left (right if buttons reversed) mouse button on the 'Sign up for free' button? - if not, what happens? Do you get told one or more of the text input fields are wrong?
23) If one or more of the text input fields are wrong, can you correct the problems? If not what can't you do.
Assume did successful click the 'Sign up for free' button
Then your signed up.

Trying to sign up with google?
As you've noticed above the questions that keep getting asked ....
what do you do ...
what do you see ...
what errors do you get ...