Missing checkboxes in "Get more Apps"
Is it OK that they lack the checkboxes? screenshot: http://goo.gl/CjrdtK
Also, Avast antivirus refused to download the update, so I had to disable it for a short time and updated manually with 7Zip.
PA12 - W7-64-bit - Avast-2014
You have screen reader mode turned on in advanced options which shows it as a keyboard accessible standard list. Uncheck the bos in advanced options and the check boxes will return.
Sometimes, the impossible can become possible, if you're awesome!