Unable to Install (sharing violation)

[Hotkey]

Hi all,

i just bought Panzer Corps but im not able to install it. During the installation there appears an error message with the following text:
"Encountered a sharing violation while accessing C:\Program Files\Slitherine\Panzer Corps\Data\Operation Huntress.pzscn"

After confirming the message the dialog disappears but the process hangs and has to be killed by the task manager.

OS: Windows 7 32 Bit, UAC disabled
Retried to install with administrator priviliges, same message
120 GB Free Space
Antivirus disabled (Temp.)

[VPaulus]

What's the size of your install file?
It should be like this:

Size: 428 MB (449.224.745 bytes)