Clean up

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) Celeron(R) CPU 2.80GHz, x86 Family 15 Model 4 Stepping 1
Processor Count: 1
RAM: 1006 Mb
Graphics Card: Intel(R) 82865G Graphics Controller, 96 Mb
Hard Drives: C: Total - 57225 MB, Free - 33997 MB; D: Total - 18330 MB, Free - 6507 MB;
Motherboard: Intel Corporation, D865GVHZ
Antivirus: AVG AntiVirus Free Edition 2014, Updated: Yes, On-Demand Scanner: Enabled

What can I do to clean get rid ofstuff on my pc?