My OS is Windows XP, i'm worried about this ntuser.dat it seems someone has hacked my computer and has access in it, my files might be at risk (I'm working on a OL job), this is only a Home PC it doesn't have any workgroup but now, it has administrator server and I don't know how that happened. is my computer be accessed by someone now? How can I get free? how can I destroy this ntuser.dat? my anti virus is Avast!Antivirus but it doesn't remove even if i reboot it what should i do? i'm worried about my clients personal files they might access it and abuse it. HELP ME PLEASE every time i try to delete it this error pops out - "Cannot delete NTUSER: It is being use by another person or program." close any programs that might be using the file and try again." before it only has Administrator now it has 2 Administrator and Administrator.WINXPSP2 I can't get access the original Im using the Administrator.WINXPSP2 right now what should i do?? i want that ntuser and every virus related to it to be gone so my files and my clients files are also safe. PLEASE HELP ME ASAP! 
