Insufficent space on "K" ?

A friend of mine lent a CD with a version of virtual DJ on it to a friend of hers.
The CD disappeared but in change of that her friend returned her the software on a pen drive.
Now she’s not able to make it work using her Windows 7 OS getting “Insufficient disc space on “K”.
What the hell has to be done?
If you ask me for more details (I don’t know which others are needed) I’ll refer to her and bring it back here.
Cheers mates, hope you can help..