[BCHelp6]

Itunes has been working on our computer for years and just out of the blue we started getting an error that said err=-1450 during downloading of digital movies or songs. I can't find any information from apple and even contacted customer support. They blamed it on my computer. But whatever it is, I have no idea what to do to fix it. When it first showed up, I lost all my files in itunes and need to download all purchased again. As I did that, I noticed the same error on the songs, so any help would be great! Below is some information on my computer. Thanks for any help you can give me.
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 1.80GHz, x86 Family 15 Model 1 Stepping 2
Processor Count: 1
RAM: 2045 Mb
Graphics Card: Intel(R) 82845G/GL/GE/PE/GV Graphics Controller, 64 Mb
Hard Drives: C: Total - 152625 MB, Free - 112017 MB;
Motherboard: Dell Computer Corp., 02X378
Antivirus: PC Cleaner Pro, Updated: Yes, On-Demand Scanner: Disabled