Help! My macbook wont install silverlight

so recently i got an account for Netflix. in order to watch video, i have to install silverlight. when i start to install it everything thing goes fine until it wants my password. When i put in my password, it doesn't do anything. it would just go back to the install page as if i didn't put in my password. i would repeat again and again and nothing would happen. i have also noticed that this would happen every time i want to install something that requires my password.

And yes i have restarted safari and my computer many times and all. Even changed my password and still nothing will happen.

benwiggy said:

Can you provide a bit more detail?
What OS X version?
What EXACTLY happens after you provide your password and what do you then do?

Normally, you should provide your password to authorise the installation, then you click through the installer.
You can check whether Silverlight has been installed by seeing if a plug-in with Silverlight in its name is in /Library/Internet plug-ins.

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i have version 10.7.5. I checked the internet plug-in and silver light is not there
Also this happens every time i need to put in a password, it would just go back

old-wiz said:

are you set up as an administrator?

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there is only one account on my macbook. i am the main one

badams002 said:

Your admin profile may be corrupted. Try creating a new one, log in with the new one, and then try to download. Also make sure Firewall is not turned on.

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i cant make a new account. it tells me to put in my password, then the same thing happens, it just goes back. Also firewall is not turned on

satcomer said:

Boot into Recovery Mode and follow the steps in the blog post How to reset password for Mac OS X 10.7 Lion.

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i couldn't reinstall it. It says that there is a SMART error

satcomer said:

That is a hard drive problem! Try to repair that drive or better yet replace that drive, with an SSD.

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is there any way of getting rid of SMART error without having to buy replace everything?

satcomer said:

By the time the Smart error happens even if you can repair it means the hard drive will fail hard again in the near future. Trust me when I say this replacing a spinning drive with a SSD will give that Mac a big boost.

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by replacing this, will i loose anything on my macbook?

53kyle said:

Yes, you will lose everything, but if you back up all of your data first, you can just put it back afterwards.

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how do i do this? Please be specific.