Nokia Pureview 808 has arrived in Bolehland for RM1899. A very stiff price for a Symbian phone. Unless photography is your main priority better get a 64GB N9 for RM1600 instead.

not sure which on the screen you meant, home feeds?

you want to deactivate the update? or uninstall it?

Go to Settings->Mobile Network and select "Don't allow" at the Data roaming selection (the 4th entry from top) should disable your phone from roaming data 

1. my android sesuka hati reboot own its own, but before that, it lags ALOT.
2. Yeap, my N9 hardly lags even though with heavy usage.

And..I charge my phone when the battery less than 30-49% by using laptop/PC.

Go to Control panel, open device manager and look for a driver or device with (!) on it and delete it.  Also try Start>Run>msconfig check the startup tab and see it there are any items which should not be there and uncheck them.

There's no need to get any N9 driver. Windows will install the necessary drivers when you plug it in. However in your case you can try installing Nokia Link which will install some drivers.

If your system is already messed up installing more drivers may make it worse. I would try the following in this order.

1) Run an anti-virus check. PC clean
2) System restore back to a date where it works with your N9 or before you first plug your N9 in. Not possible. Problem occurs months ago and I doubt the restore point is still available
3) Delete the USB controllers from Device Manager and re-install from the CD which comes with your motherboard. Ha. 4 yrs old PC where can still find original CD.But it's a Dell so may be Dell got it
4) Re-install Windows as a fresh OS, not on top of the old OS. This is drastic and lots of work. More work than this annoyance.

The 4th option is very drastic but if you want to get rid of the annoying double boot you have to bite the bullet. It will probably clean up a lot of other things as well.

Probably a feature of Symbian but not a feature of MeeGo.

I think that is due to USB on the go which N9 doesn't have.