Windows Password Recovery

I am trying to access my Windows 8.1 and can't remember my administer password.I need to reset it so I can use my laptop. How can I access it.
Thanks


Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows XP Professional, Service Pack 3, 32 bit
Processor: Intel(R) Pentium(R) 4 CPU 2.80GHz, x86 Family 15 Model 3 Stepping 4
Processor Count: 1
RAM: 509 Mb
Graphics Card: Intel(R) 82865G Graphics Controller, 96 Mb
Hard Drives: C: Total - 38138 MB, Free - 25582 MB;
Motherboard: Dell Computer Corp., 0U2575
Antivirus: Norton 360, Updated: Yes, On-Demand Scanner: Enabled