MBR problems with vista

[Gajjar]

I have had a strange experience in upgrading to Ubuntu 10.10 on a
Dell Inspiron 1545 also running Vista. I was upgrading from a Ubuntu
8.04 that I thought would be worth reporting/sharing in case others have had a similar experience. last week I upgraded to Ubuntu 10.10 using the
live cd. Everything seems have gone smoothly. I could log in and out of
ubuntu. After logging into Vista and logging out, the next time I tried to
start the machine, there was a 'segment offset error' with the boot loader
and there was no way of rebooting into anything except to use the Ubuntu live CD and go to
a terminal and reinstall the bootloader. The same thing happened after
logging in to Vista- this seemed to mess with the boot loader. Logging in first time was not a problem.
Yesterday I started again, wiped out 10.10 and re-installed ubuntu but version 10.04.
Logging in and out of Vista is so far ok and I have not had any problems.

I do not have an obvious logical explanation to the sequence of events
unless there is a problem with the boot loader in version 10.10.

[Rubi1200]

Hi and welcome to the forums :-)

Use the LiveCD to boot the computer and run the boot info script linked at the bottom of my post (instructions included).

Post the results back here so we can see the current state of your setup.

Thanks.