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Why do restore points in Windows Vista use so much disk space?
Saturday, March 10th, 2007
A reader asked us why restore points are so large in Windows Vista compared to Windows XP. He 
notes “The average XP restore point was around 50 MB. On Vista, restores points vary between 1 GB - 3 GB.” Why the big difference? Eduardo Laureano, the Program Manager for System Restore, explains: In Windows Vista, System Restore is now based on the VSS technology, which keeps track of block-level changes across your entire volume.
In contrast, Windows XP System Restore would keep copies of changed system files by using a file system filter. The Filing Cabinet : Why do restore points in Windows Vista use so much disk space?
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