acer laptop partition

I have an Acer laptop with 60gb installed running xp,when i looked in my computer it shows C drive has 26.6gb and 16gb free space and also a D drive called Acerdata which has 26.6gb and only 7gb of free space.I only found this out when i did a defrag and the c drive took about 2 hours to defrag and informed i didn't need to defrag the d drive as it hadn't been used.What is this partition a why is it so big i thought i owned a 60gb comp

You do have a 60gb hard drive, its just partitioned into 2 drives. the second partition is used for Oem restore program, but usually this partition is limited to less then 10 gb, usually like 6 or so. But I see you said it is 26 gb with only 7gb free, so thats an awful large restore partition.

yes it has data on most acers and c driver that is what my work laptop is like