|Why would you go to Office Max for a hard drive? |
We need to know the capacity of the current hard drive. You indicate WinXP as your OS. If your system is extremely old you may not be able to use a hard drive larger than 137GB.
Also, if your WinXP CD is the original version it is not 48 bit LBA compliant, which means you can't install WinXP to a partition larger than 137GB, even if your motherboard IS 48 bit LBA compliant.
Post the model of your computer for help with those possible issues. If your original hard drive is larger than 137GB then you have no issue with using almost any capacity hard drive. The exception may be if you have a laptop. Posting some specs would have been helpful.