Thanks Carey, it was the ram. Replaced it and everything is fine.

"Carey Frisch [MVP]" wrote:

> This behavior can occur because of damaged random access memory
> (RAM) modules or a damaged RAM slot.
>
> "An Unexpected Error Has Occurred (536821760)" Error Message
> When You Try to Install Windows XP
> http://support.microsoft.com/kb/316400/en-us
>
> --
> Carey Frisch
> Microsoft MVP
> Windows - Shell/User
> Microsoft Community Newsgroups
> news://msnews.microsoft.com/
>
> -------------------------------------------------------------------------------------------
>
> "IFD firefighter" wrote:
>
> | Upgrading to XP from 98 w/ upgrade disk. Transferred files fine but when it
> | rebooted to continue install received this error message: unexpected error
> | (0)
> | occurred at line 1773 in d:\xpsprtm\base\boot\setup\arcdisp.c.
> |
> | Any idea what this is or means? Data base search was not productive.
>
>