|It tends not to be the 'fault' of the customer, it's often the customer's 'best mate'. I still come across customers who have XP and have never gone beyond SP1 'because my mate said it just messes up your PC'. That's great until you get an issue where the security is compromised, or a piece of software demands SP2, at which point, because it's been left so long, & they've probably downloaded the odd post SP2 KB pack which was needed for something else, they cannot get SP2 or SP3 to install.|
On a completely fresh install of any version of Windows, the Service Packs will install faultlessly, whether they are slipstreamed or done piecemeal. If there is a problem with the Service Pack installs after Windows has been running for a while then there it's obvious that the fault lies with hardware or software that was installed after the initial install - nothing to do with Windows or the ServicePack, That's the part that needs sorting - easy!.
"I've always been mad, I know I've been mad, like the most of us..." Pink Floyd