I have downloaded 3-4 times xp mode from MS but during file extraction it says file is corrupted?what should I do?

My Computer
- Computer Manufacturer/Model Number
- acer aspire 5920
- OS
- windows 7 ultimate x64
- CPU
- core 2 duo T5550
- Motherboard
- acer chapala
- Memory
- 4 GB DDR2
- Graphics Card(s)
- Intel GMA X3100
- Hard Drives
- 500 GB