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> **Possible Duplicate:**  
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> [Which is the best Ubuntu Flavor for an old laptop?](https://askubuntu.com/questions/50181/which-is-the-best-ubuntu-flavor-for-an-old-laptop) 
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I am totally new to Linux. I downloaded ubuntu 12.04 and installed it on my old laptop with 512MB ram, 1.66 ghz processor on a partition of size 10GB( with windows xp on another partition.) Now when I boot to linux it shows Lubuntu at the start screen(which i found out is a lighter version or something, may be because of low specs) . 

Now when I run ubuntu and try to browse 5-6 tabs on firefox it starts getting sluggish. Do I need to switch to an older version of Ubuntu or is there any other fix to this?? 

Thanks in advance!!