Installation error (not a valid srep file)(unarc.dll error -5) while installing Metro Last Light

[Anuroop Hari]

I've been trying to install Metro Last light and every time i run the installation, it hangs at a certain point and then returns the error (Not a valid Srep file) and then another window pops up saying unarc.dll error -5.

I've tried running as admin and even changing the install location. No Use.

I would really appreciate some help.

 

[rgd1101]

Where did you bought it from? can you return it?

 

[Anuroop Hari]

Where did you bought it from? can you return it?

I received the Optical Disk from a friend. It worked fine on his pc.
He runs windows 7 64 bit

My specs:
Windows 8 64bit
8gb RAM
Intel i7 3630
Nvidia gt650m 2gb

 

[rgd1101]

so sound like your friend pirated the games. so buy your own.