|Your video on your computer does not need any software on the hard drive while booting in the first part of the boot.|
If you get the horizontal lines BEFORE Windows loads while booting, it can't be a software problem - it's a hardware problem.
In that case, or in any case, try connecting a monitor (only connect it or disconnect it when the computer is not running) to your VGA port if you have one on the notebook, to see if that cures your horizontal lines problem.
Your booting problem.
- remove any bootable CDs you have in drives
- press F8 repeatedly while booting, don't hold down the key
- when the boot choices menu appears, select
Enable VGA mode
If that gets you to the desktop - the screen resolution will probably be lower and the icons will probably be bigger - your problem is probably caused by something to do with your specific video drivers you have loaded for your display (video) adapter in normal mode.
If that doesn't help, and if Safe mode and Last known good.... don't work either when you select them from the boot menu...
Check your hard drive with the manufacturer's diagnostics.
See the latter part of response 1 in this:
(thanks to Dan Penny for this link:)
Hard Drive Diagnostics Tools and Utilities
If you don't have a floppy drive, you can get a CD image diagnostic utility from most hard drive manufacturer's web sites, but obviously you would need to make a burned CD, preferably a CD-R for best compatibilty, on another computer if you need to.
If the hard drive itself tests okay, any data problems found can be fixed, one way or another.