Scandisk runs unexpectedly at the first boot of the day after installing NAV 2009

Good morning to all members.

 

I've a problem that has started right after upgradinf from NAV 2008 to NAV 2009.

It's a bit weird behaviour: when i boot windows up for the first time in a day, windows halt loading itself and prompt me with the blue screen that says: "your disk C: has a coherence problems and windows has to check it" then a countdown and than scandisk starts...i used to see this screen when lights go out and win can't shut down properly...and that has a cause-effect explanation...but this time it happens without apparent reasons.

After finishing it's scanning work, scandisk found sometimes a 32kb lost cluster that convert in a file, other times it finds nothing.

 

Another interesting thing regarding this issue is this: as i turn on the "Early protection" option in NAV 2009, scandisk run at EVERY reboot, regardless if it's the first or the 2nd, 3rd of the day.

 

What i've done till now is:

1) Performed a full scandisk (with surface controls) twice. It took a long time and didn't found nothing. I've performed it on every partition of my disk (C: and D:). C: is the system volume.

2) Contacted Norton support, that ran Norton Removal Tool uninstalling and reinstalling Norton Antivirus 2009 again. After that i experienced same problem again.

3) Performed a full virus check. No results (except stupid cookies).

4)Recontacted Norton support that has checked for scheduled events in my control panel and found nothing.

 

It's clearly something related to date changing, and it's related to NAV 2009, cause i haven't installed anything else after it and I ran succesfully NAV 2006, 2007 and 2008 on this system, without reformatting and without having this issue until the day i installed NAV 2009.

 

Any suggestion would be appreciated (i wouldn't like to use system recovery partition of my acer notebok to restore out-of-factory configuration).

 

I'm using XP Home -  SP2 - 2 FAT 32 partitions - 1 Hidden partition (recovery environment)

Windows is updated daily.

NAV 2009 version is 16.2.0.7

 

Thank you for your attention.