Folders in 'C' containing .log files

OS = XP-MCE

'C' contains a fair number of folders, labels being mixed alpha-numeric,
16-20+ characters long, eg . b2997ef2dea84742d3d009

Each folder contains, with one or two exceptions, no more than one (1) .log
file a quarter meg to a meg+ in size.

For instance, one reads: msxml4-KB927978-enu.log All in all, they take up
about 20Gb of disk space.

What are these folders for? Are they needed? If so, for what?

Dumpable??

Thank You for feedback.

Wayne