The blau.exe file you have requested: Skins / Weapons / CS: Source Blue Weapon Skin Vol (v1.0) - 5.85mb is not available. Perhaps try browsing all files for the game Counter-Strike: Source and upload any files you want to share or are missing. This is the only information we could locate:
A nice blueish weapon replacement skins made by ArWa. Read the readme how to install this properly!