Invalid package error

I used to be able to download music from beemp3 and 4shared. When I hit the link and reads starting download...but nothing.

When I try to download an app from playstore, it downloads. But when trying to install, my devise gives me a invalid package error.

I've tried 3g 4g and wifi.
 
What kernel are you running? Custom or stock? Have you cleared app cache and data for the play store?

Slithering from the nether regions of a twisted mind and tarnished soul