fsck is a command use for checking and removing bad sectors from your hard. its
not a big deal. in my ubuntu its start every time on bot too. i never pay
attention on it.

Why I ask is that it never came up before but after an update it did and after
google the matter It gave me information what it is, is it an error or just an
information that I don't understand

The link below may help, it's all about how to set the fsck schedule
and other things related to it. If you set the check to every 30 boots
as is the default and it still runs every time then it's either not
finishing correctly or there are errors it cannot fix so tries to do
it all over again the next boot.

http://ubuntuforums.org/showthread.php?t=300477

Also go to [ System / Administration / Disc Utility ] and check the
SMART information for the drive to see if there's anything untoward in
there such as high read/write errors or sector re-allocation count.

HD checking every boot may be the system warning you that it's dying
on you !!

If the SMART data is all OK then the HD can be ruled out but there can
still be file corruption that FSCK isn't correcting, or the number of
boots between checks has been set to 1 - i.e. every boot. Did you try
the command to set the number of boots between checking ? Might be
worth temporarily setting this to zero ( i.e. never check ) to see if
FSCK still runs on boot.

Also since this appears to have happened following an update then you
may have a bad update. Check the status bar in Synaptic for any bad
packages, if there are any click on [ Edit / Fix Broken Packages ] to
try and fix them.

I have no trouble in synaptic

I assume it is all informative

All I can think is that FSCK doesn't complete correctly even though it
finishes the check and Ubuntu loads - so it sees the flag to run every
time the PC boots. Apart from the delay in startup the HD will be
getting more wear than it should, but at least you'll pick up problems
early

I booted up on my test ubuntu and ran a complete fsck -cf on the main partitions
and everything is fine
When I run it alone I get the same message as in the bootup, so I assume this is
all informative.
Would be nice to know what it means though?
Perhaps stats on how much I have used versus the total available