You need your CPL files. Your control panel features are linked to CPL files, but in many cases, the icons that they use are also in other CPL files. Make sure you have c:\windows\system32\main.cpl (this CPL file has the icon in it for Administrative Tools (for example)). You could copy the CPL files from another working machine, you could undelete them, you could do a "repair install" (without formatting), or you could manually extract them off of the XP CD (they are compressed and you can use the expand command or get them out of the cabs)).