|Why do you suspect the graphics?|
"my HardDrive had not enough space"
I highly doubt this is the cause of your current problem, but it definitely is a problem. Apparently you don't manage your HDD space efficiently. Do you run a cleaner? If not, running CCleaner Portable from a USB thumbdrive will probably free up 1 GB or more. And reducing the System Restore percentage as suggested above (or temporarily disabling it & then re-enabling it at a lower percentage) should free up a considerable amount of space. Base the percentage on the size of your HDD - the larger the drive, the lower the percentage needed.
Once you gain some breathing room, start uninstalling any programs that are outdated or unnecessary. Then move your personal data (photos, videos, music, etc) to an external drive or some other media (CDs, DVDs, etc). You should be backing up your data regularly anyway.
"it crashed with the blue screen of death"
What was the STOP code error message? Knowing that would help us determine a fix. Make sure you have the auto-restart feature disabled.
1st things 1st though - you need to run a HDD diagnostic to test the integrity of the drive.