I have an old laptop, with local c-drive and d-drive. These days the free space in my c-drive fluctuates a lot while I'm not doing anything unusual (just writing with Word or browsing the internet). The free space would change from 1.2 GB to 130 MB, and then back to 600MB, and then back to 130 MB again. Windows keeps giving me warnings that I have insufficient space in the C-drive, while I'm not doing anything unusual. What's going on? I've done a virus check and didn't find anything. Thanks for any clue.
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