Boot your windows installer DVD/USB:
At this point go to 'repair my PC'> troubleshooting > get a command prompt.
At command prompt, type 'diskpart'
then in diskpart type the following.
'list disk'
it should tell you your disks, remember the number of the disk you want to erase and install on.
Now type 'select disk 0' or possibly this 'select disk 1' (just depends on the number your SSD drive is).
Once you have selected the SSD drive # in diskpart and your sure you have nothing you need on it type "clean" and hit enter.
This should wipe your SSD drive 100%.
at this point you can type 'exit' to get out of diskpart.
Now you can type 'setup' and hit enter and do your install again.