Can't I play my PC games if I nouns them into my portable harddisk and play on different PC?
Answers: Yes and no. If you just install the spectator sport to the portable hard drive and afterwards you bring the hard drive to your friend's place, you won't be capable of play it because it still requires the original disk. If you bring the winter sport disk, then you can.
The other means of access is to create a virtual drive which tricks the PC into thinking that the disk is in the drive.