I get a error message when trying to install sp2 saying that windows could not allocate enough space in registry log?????
Can any one help????

Sounds like your partition is too small. Windows asks you your partition preferences when loading or you can use dos fdisk to repatrtition your hard drive from a boot floppy.

Best to install it by doing a full PC restore from scratch. Back up your important files (photos, music files, etc) first, then go for it. Turn on your PC, then follow the instructions on screen before it boots up any programs. Your instruction manual should have something in it along these lines.