Try downloading the direct CC installer abd installine CC over CC if the cloud thinks its still installed. Use the direct installer not the cloud desktop application to install. Adobe CC 2014 Direct Download Links: Creative Cloud 2014 Release | ProDesignTools
it says "Photoshop is downloading now" and it never did anything
What type of internet connection do you have? The Photoshop CC download is over 1GB it can take a few minutes to some number of hours to download depending on you internet providers download speed. Once downloaded you need to extract the files and run the setup installer.
CC 2014 come in two versions 64bit and 32 bit on windows so those versions are a littlr under 1GB.
Adobe CC 2014
Windows Mac OS Size Files Size File Photoshop CC 2014 (32-bit) 711 MB **** File 2 Photoshop CC 2014 (64-bit) 740 MB **** File 2 801 MB File 1