Home Forums Tech Helproom Windows 7 SP1 Forum Rules | Contact Forum Editor | Report a Post Windows 7 SP1 Clapton is God 16:28 02 Apr 2011 Locked Have just tried to download and install Win 7 SP1 on daughter's HP laptop (Win 7 64 bit).It downloaded OK (from Window Update) but failed to install with an "unknown error".Anyone know of a workaround or a way to install it manually? Nontek 16:36 02 Apr 2011 I would delete the Download and start again from scratch - might just have been a blip in the download or installation. Clapton is God 17:45 02 Apr 2011 Strange.I hit 'Try Again', a further 87 meg was downloaded and this time it installed. morddwyd 19:35 02 Apr 2011 You're not the only oneclick hereI have uninstalled with no noticeable ill effects. This thread is now locked and can not be replied to.