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How can I improve overall system performance?

As stated in the title, I want to know how can I repair my existing OS, Ubuntu 12.10.
It seems to be very slow, earlier I installed it along side Windows XP (32-Bit) at that time it was working fine. But now its very slow. And I've removed Windows XP.

Is there any way I can repair it? Or I've to re-install it completely?


Features of my PC:

Processor: Intel Core 2 Duo 2.20 E4500
Motherboard: ASUS P5KPL-AM
RAM: 2GB
GPU: Nvdia GeForce 9500 GT 512MB

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Welcome to Ask Ubuntu! What exactly is slow? The bootup process, starting a certain application, graphics, etc. Also include more details about what the bottleneck might be. Start by running System Monitor to see if some application is using all resources. –  gertvdijk Jan 18 '13 at 23:44
    
Bootup process and loading of applications is slow. As for application, when I click the icon, after 4-5 seconds it loads up. –  Cryptic-Lad Jan 20 '13 at 9:35
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marked as duplicate by qbi, Ringtail, Eliah Kagan, Eric Carvalho, Mik Jan 19 '13 at 11:15

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1 Answer

check you boot up service and install BUM (Boot Up manager)

sudo apt-get install bum

install ubuntu tweak and try janitor to clear cache files

sudo add-apt-repository ppa:tualatrix/ppa 
sudo apt-get update
sudo apt-get install ubuntu-tweak

try to install preload service

sudo apt-get install preload

I hope these tips may be able to help you

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Thanks for helping. I'll let you know after installing these. –  Cryptic-Lad Jan 20 '13 at 9:37
    
ok i waiting for you ! –  Hany Alsamman Jan 25 '13 at 21:50
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