Losing inordinate hard drive space after web surfing--sometimes as many as 300mg after visiting only one or two sites. Clean disk regularly and have resized system restore to 1Gb. but steady erosion continues.
Use Windirstat Utility and expand the drive to see all folders. Take a snapshot of folder usage to compare later.
Go on line and when finished, redo, Windirstat. You can see what folder on disk is increasing, and go from there.