However some of it is supposed to speed up the boot process, so maybe parts of it could be kept. Anyways, my experience with a Lenovo z580 lappie was that i had no trouble running win7 and ubuntu side by side, but reading the experiences of others that may have been to do with the fact that i wiped out the HDD first, then installed win7 from a USB stick, and then installed ubuntu from a stick too. Apparently going that route vs installing from optical media makes a difference here, had something to do with the file system used in each case. Google it if you must.