my c:\documents and settings\All Users

I would use Tree size to find out what is taking up all that space, and then deleting what you can.

http://www.jam-software.com/treesize_free/

I would not delete the All Users profile completely from the machine.

you need to look through it to see where the 2.5Gb is and be sure that what is in there is OK to delete. Then dont delete the top level folder just get rid of anything inside it that is not required. You can use something like "Treesizefree" to get a better idea of the structure and size of the files/folders inside it.

Check the Antivirus products files in that location. Some AV products download all updates to the All Users folders and dont delete them.

What AV do you use on that server?

AVG as antivirus.
this folder is using most of the space.
 c:\documents and settings\All Users\application data\microsoft\search\data\applications\windows

this folder is aobut 2.4 GB. can i delete this folder?

I have set up the service "windows search" Manual started. server will be reboot it tonight. let you know. Thanks.

i was able to free up a lot of space.