somethiing is randomly writing 2 folders at a time to the root directory of each HDD attached to my laptop

Question

Each directory is named something that appears valid and contains 15 to 20 files that also look valid, but are nonense.

Answer 1

First:
1. Open UnHackMe,
2. Click "Help in Removal" button on the main screen.
3. Choose "Send us RegRunLog".
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5. Describe your problem.
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7. Click "Upload" button.
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