Virus TI - VC Problem

[Kanix Cane]

Cheers, hope I will have a nice stay here

The spec of my Frost is as follows:
Frost ACM-320D - Pentium®D

Aluminium Tower - Anodized black
IntelP Chipset - DualCore support
Intelbit Pentium D 930
(2x 3.0 GHz 4MB Cache)
1.0 Gb PC533 DDR2 RAM
DVD +/- Dual Layer writer
250 Gb 7200 rpm System HD
(16MB Cache 24/7 cert.)
250 Gb 7200 rpm Audio HD
(16MB Cache 24/7 cert.)

2 monitor outputs (1xDVi/1xVGA)
2x Ti Firewire (front/rear)
6x USB 2.0 (2front/4rear)
Gigabit (1000 Mbit) Network
4x available PCI slots
2x available PCIe 1 slots
1x Printer port
1x serial port

Windows XP Pro - Multilanguage, optimized for audio
Keyboard/optical mouse

I have tried to change USB ports without any progress.
Well, changing BIOS is a little bit sensitive in this case as the computer is optimized for audio by the Frost ACM company, and I don't know if I'm able to get support etc if I'm changing in the base settings. Will research more about that!
Also I have tried to reinstall the software several times, the last time I thought it was fixed. Could play maybe 5 minutes with VC. After that the USB connection seemed to fail.