OK, specs.
1.4GHz Intel Pentium 4
14.8 GB free out of a 30Gig Hard Drive
nVIDIA Geforce FX 5200 Video Card
It started when we got the virus (which has since been removed by a computer company, and our antivirus software) When the lines began, it also slowed start up time. When boot up gets to the Windows XP logo and loading thingy, it takes two or three minutes to start the computer. Where as it was faster before. I can't remember if they were there when we got the new video card or not. I believe they were though.