Hi there folks I have a bit of an issue here trying to install ServicePack1 to a Samsung RV511 x64 laptop. I've read various things now to try and solve this issue, but none seem to have done the trick. I've downloaded and run the 'system readiness tool' -Windows6.1-KB947821-v10-x64, to no avail. I've ran a sfc /scannow which didn't seem to do anything. I've taken a quick look through the cbs.log and can't see anything abnormal, but I'm no expert. The easiest option, for me, would be a factory reset, and a resoftware of this machine, but that would be the easy way out! We've had many of these Samsungs through the Builds Department now and this is the first one with the issue.