It all started when I updated the BIOS. The reason I updated the BIOS was because I wanted to run VMware workstation. I had loaded the VMware workstation but it wouldn't load an ISO. when I updated the BIOS the VMware workstation worked great but then I started to experience issue. I haven't run VMware in a week but I'm still getting screen lines.
Here's my specs:
Windows 7 Professional SPK1
Intel Core 2 Duo CPU P8400 @2.26GHz
running on a Lenovo R400 laptop