My laptop works perfectly fast with Windows 7 but is very slow in Ubuntu 12.04.When I try to open the dash it takes 1-2 sec.even the normal right click on the desktop for the dropdown options is taking time.I installed preload but it made a very slight change. Everything is up to date.
My laptop is : Lenovo ideapad Z560
500 GB hard drive (dual booting win7 and Ubuntu 12.04)
3 GB RAM
Intel® Core™ i3 CPU M 370 @ 2.40GHz × 4 processor
Nvidia GeForce 310M/PCIe/SSE2
Ubuntu 32 bit