Can you ID the comp from the following:
http://usa.asus.com/products/desktop/dktindex.htm
Do you have the manual?
OEM (Original Equipment Manufacturer) means that XP was installed by the manufacturer. You bought the machine with XP installed.
It also means that rather than a full version XP CD you have some type of Recovery CD.
We need to know how Asus intends that Recovery CD to be used.
Thus if you can ID the model & or find the manual & look up Recovery Options.