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Hello I have problem with Ubuntu 12.04 LTS, it's always give me a lag and I don't know what to do.

My laptop I think is fast, so how can you help me ?

And one other problem, how to remove password for admin, because system always request the password, for everything ??

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Could you state when the computer lags and what you are doing at the time ? – Mark Kirby Aug 12 '12 at 12:54
just surfing in the internet and everything always lag, browser gets to the dark color and everything stops – Robertas Aug 12 '12 at 12:55
You can try "sudo apt-get install --reinstall ubuntu-desktop" to refresh the desktop in a terminal and "sudo apt-get update" to update software sources and then run update manager to make sure you have the latest packages – Mark Kirby Aug 12 '12 at 12:58
Also what type of graphics do you have ? Check system settings / additional drivers in case you need drivers – Mark Kirby Aug 12 '12 at 13:01
i made updates and reinstalled desktop, maybe it will help. thanks – Robertas Aug 12 '12 at 13:01

You should not remove the admin password as this will allow your system to be hacked an insecure but you can log in as root READ THIS

This will allow you to by pass the password and you can find your old home folder at /home/username

This is not recommended my best advice to you is use a short password and dont be lazy..:)

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