Weird booting !

I got a memory error message but not the first time and it finished dumping physical to drive which well is good. But after i rebooted, my windows boot up screen doesnt show any more. All that comes is the POST and after that a black screen with a half an inch white line at the bottom and doesnt continue to windows.

When i hard reset it form that state it will ask me to select how i want to boot, when i select last setting that was working, it does the thing thats mentioned above. When i click start normally then it boots up, but same screen as above BUT continues to windows.

I ran a scan disc and defragmented but nothing shows or changes. I got the error of the memory error in a log and will try to load that up ASAP

Here are my stats:
Windows XP Pro SP2
AMD Athlon XP 3000+
1gb (2x512) ram
ATI x800XL
1 seagate 120gb (this is the OS drive)
1 westernD 160gb (hooked to an ata controller)
1dvd-rw
1dvd
1cd-rw

anny suggestions welcome and i will upload the error log

thx