It may not help, but it did for me when I had a little problem like this, I dunno how it affected it, but check this.
Right Click My Computer > Properties > Hardware > Device Manager > IDE etc. Controllers (or whatever your Harddiscs are) > look for the UDMA controller > Double Click it > Device Property and Check the UDMA Mode for the Harddisc Paintball or just Windows is on. I remember my computer could barely start Paintball and had those white lines constantly with that way below UDMA Mode 5. It might help, I'm just throwing it out there, but I dunno if it will help here.