If you just installed Lightroom for the first time, you are NEW to LR, then you got one of the worst releases ever produced of LR by Adobe.
I suggest you Uninstall it and follow this link to the LR Queen website to install LR CC 2015.1.1 and or LR 6.1.1.
There are some Major bugs in the newest release along with a very crippled import dialog section. LR by default should NOT search your hard drives for images. It should be left up to the Users to determine which images get imported and from what drives and folders.