In a few weeks time a kind of 'SP2' will be available, basically a roll up of all the updates since SP1. I've checked the page and there is a 300mb update available which may help?
You will have access the page using IE: https://support.microsoft.com/en-gb/kb/3125574
Noooo ... I don't as yet have any updates to install ! It offered unspecified updates Sunday (Monday?) but accepting took me to Control Panel>Update. No updates were shown as available there. Search for Updates did not succeed in finding anything up to 12 hours later.
I'll try the Rollup W7 update detailed by Kemical above.