[Fixed] Wierd Installation Error

I have been having alot of of problems with Impulse, Sins and Entrenchment.

First, I try to install the full version of Entrenchment. Sins and Impulse then stop  working.

I get my computer formated, every thing was wiped, I started from scratch.

I just downloaded Sins off of Impulse which works now, but when it fully downloaded, I clicked on "install" and it didn't install it just started to redownload.

I cancelled it but could this cause problems if it has partially downloaded twice?