When i run the patch it says "no installation of emperor: rise of the middle kingdom was not found on this computer. you cannot install this update." i just copied the game from my friend. do i need the actual cd of the game to patch it?if not what should i do to patch the game?

SOURCE: I've had "Emperor: Rise of

A CRC error points to the cd that you are installing the game from. While the installation program copies the file to your computer it runs a check to see if the file is being copied correctly with a mathematical calculation. If the calculation does not match a checksum stored in the file then a CRC error is given. This in short means that the portion of the cd where the data2 cabinet file is stored is damaged.
Try cleaning it or try with another drive on the same computer. Another drive may be just a little bit better aligned and able to read the damaged portion better. Alternatively try getting another copy of the game and install from there. (Please use original discs only.)