lets say if i use a software which is trial version and it only last 2 day. if after 2 day can i uninstall the trial and re install it again with 2 trial days more?

if it works .. who needs original software ?

common sense

When the software expires, your system would had been 'tagged' as 'trial expired'. So attempt to reinstall the software will still result in 'trial expired'.

it will not work. the trialware will detect your previous installed and expired right away once launch the application

Depends....

But im sure u can reinstall if u reformat whole computer

or set a backup point and restore every 2 days

@dannygoh,
Don't U think it's worth paying if one had to reinstall the drive every 2 days?