Well the header says it, really. Microsoft is rolling out a major update in October and it's going to be on users to make sure they have enough hard drive space to install it. From what I read, the previous April update was around 16GB for the 32 bit version of Windows and 20GB for the 64bit version. So with that in mind it's probably a good idea that you make sure to clear some space on the ol' boot drive ASAP. Read more