Laptop won't let me sign in

This could help you . Follow the screenshot below and follow steps.
Go to youtube.com and click on Sign in at the top right corner. If you don't have account, there you'll find create new account, click create new account and fill up all the blanks.

click on procede anyway.

It helps if you spell it right. Point your web browser at http://www.gmail.com

If another account comes up, sign out of it by clicking the avatar in the upper-right then clicking "Sign out."

If you then still can't sign in to your account, click the "Need help?" link on the sign-in page.

Hi, you just need to install these to programs:

http://get.adobe.com/flashplayer/

http://www.java.com/en/download/

Click first on do i have java.

Or the site could be blocked by your admin.

Try to open the settings in internet explorer and click on advanced
Click on redo advanced settings and click on apply and ok.

After this you should be able to enter youtube.

Go to Tools. Hit Options. Hit the Privacy button. Press "Show Cookies" in the middle of the page. Go all the way down to Youtube.com and double click on it. Click on the first one. It will tell you something in the space called "Content".in the description. On the server problem on You Tube, look at what is says. It will say stuff like :

EXAMPLE:
(First part)ViSITOR_INFO_1KittyKat (Second part)133bd4455...

you look at each cookie description content and find the 2 that match the first and second part of the error.
Delete those cookies. Refresh the page. IT will work find, AND WILL LET YOU LOG IN.

The reason behind the error:
This is something that happens when a user signs in and out of their youtube account constantly or sees many people's channels nonstop.

The problem occurs is caused by the incorrect Microsoft Internet Explorer SSL settings. The error happens occasionally, and not all system may affected by this WLM problem. To solve the problem, following steps in the guide below:
1. In Internet Explorer, clear the Check for Server certificate revocation (requires restart) check box. To do this, follow these steps:

1. Start Internet Explorer.
2. Click on the Tools menu, then click Internet Options in the pull down menu.
3. Click on the Advanced tab.
4. Under “Security” section tree, clear the Check for server certificate revocation (requires restart) check box.
5. Click OK button.
6. Exit Internet Explorer.
7. Sign in to Windows Live Messenger again.

Go to Tools. Hit Options. Hit the Privacy button. Press "Show Cookies" in the middle of the page. Go all the way down to Youtube.com and double click on it. Click on the first one. It will tell you something in the space called "Content".in the description. On the server problem on You Tube, look at what is says. It will say stuff like :

EXAMPLE:
(First part)ViSITOR_INFO_1KittyKat (Second part)133bd4455...

you look at each cookie description content and find the 2 that match the first and second part of the error.
Delete those cookies. Refresh the page. IT will work find, AND WILL LET YOU LOG IN.

The reason behind the error:
This is something that happens when a user signs in and out of their youtube account constantly or sees many people's channels nonstop.

Go to Tools. Hit Options. Hit the Privacy button. Press "Show Cookies" in the middle of the page. Go all the way down to Youtube.com and double click on it. Click on the first one. It will tell you something in the space called "Content".in the description. On the server problem on You Tube, look at what is says. It will say stuff like :

EXAMPLE:
(First part)ViSITOR_INFO_1KittyKat (Second part)133bd4455...

you look at each cookie description content and find the 2 that match the first and second part of the error.
Delete those cookies. Refresh the page. IT will work find, AND WILL LET YOU LOG IN.

The reason behind the error:
This is something that happens when a user signs in and out of their youtube account constantly or sees many people's channels nonstop.

xp : go to start --> control panel ---> on the top leff click on "switch to classic view" then open network and internet connections right click on the wireless conn. then from the upper tabs go to "Authentication"  your setting should be as following :
Enable IEEE 802.1x ....... (cheked) EAP Type : Smart Card or certificate Authenticate as computer ...... (checked) Authenticate as gues ..............(unchecked)
then click on "properties"
choose "use a certificate on this computer" and check "use simple caertificate ......" and check "Validate server certtificate" click ok till u close all the boxes 
:D hope that would work :D