Symptoms of this type are generally caused because there is a hardware issue.
I very much doubt Beethoven himself is stopping the system being upgraded to SP3, considering he's been dead since 1827.
You shouldn't have to get a copy of it from anywhere, you have everything you need.
Best thing to do first is memory check:http://www.memtest.org/
Then a direct lift from the forum as it explains it better than I can:
Memtest86+ is directly executable by any modern x86 compatible machine, by writing the iso to a CD one can boot from the CD to run memtest.
Simply download the appropriate package, the the Pre-Compiled Bootable ISO (.zip) for Windows users.
For Windows, unzip the package into a directory like C:\memtest. You will now see a file called memtest86+-1.xx.iso in this directory. You will need to burn this file to a CD with a CD recording program. Do note however that you should not make a regular data CD on which you for instance write your text documents and holiday photographs. Instead the iso file is a so called image of a CD, it is a direct copy of a CD. Your CD recording program will most likely have a feature called burn image or something to that effect which you should use to burn the CD.