I’ve been using my TortoiseSVN client in windows and suddenly the Tortoise icon/folders icons disappear.

The answer is:

Had same issue, and was solved by running regedit, erasing some entries in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\explorer\ShellIconOverlayIdentifiers and restarting. Deleting OneDrive1… enties was not permited, but I had some from Google Drive. You can also make a bakup by double-clicking in the registry directory and doing an “Export” to a file.

More info in: TortoiseSVN icons overlay not showing after updating to Windows 10

Enjoy!!!