The details in the brackets are a memory address specific to your computer.
The error is described here and is most likely hardware as seen:
"Stop 0x50" Error Message While Installing Windows
Previous versions of Windows can often be a problem but they should not lead to your error which again is in hardware.
Should you wish to try I'd suggest wiping the partition (or the whole drive) and try from scratch. You can also then format outside of windows with GParted as seen here:
GParted
---------------------------------------------------------------
Anyway if you use GParted: Save this download:
SourceForge.net: GParted: Downloading ...
This is an ISO file. You will need an ISO burning program to burn it. It cannot be burnt as data as it is an image.
If you use Nero there is an option called "Create Disk Image".
If you do not have Nero you can use this free program:
ISO Recorder v 2
This will add the burning option to your right click options or shell.
With Nero just point it to the downloaded ISO. With the other recorder just right click the ISO and choose Burn Disk Image.
A new blank CD is required.
After the burn this CD will be a boot disk and will boot GParted.
Verify that your CD drive is set to boot prior to the hard drive and boot the CD.
There are some basic tutorials on the functions and use of GParted here:
GParted -- Documentation
To wipe I'd suggest KillDisk:
Active@ Kill Disk Hard Drive Eraser. Low Level Format.
Of course all data will be lost on the partition or drive.