re-booted

For past 2 times whenever I update my Ubuntu 8.10 to 2.6.27-11 from 2.6.27-7 , Vista gives me BSOD. The code is very long but what I was able to catch was this, mentioned in 2nd or 3rd line of the error: IRQL_NOT_LESS_OR_EQUAL This BSOD comes after the initial green loading bar and I just booted...