To update the registry, follow these steps:
- Open registry editor.
- Move to the following folder, and then expand it:
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorerShellIconOverlayIdentifiers
- Rename the following registry keys
Old folder name New folder name SkyDrivePro1 (ErrorConflict) <space><space>SkyDrivePro1 (ErrorConflict) SkyDrivePro2 (SyncInProgress) <space><space>SkyDrivePro2 (SyncInProgress) SkyDrivePro3 (InSync) <space><space>SkyDrivePro3 (InSync) On the View menu, click Refresh to verify that the renamed keys now appear at the top of the list.
- Exit Registry Editor, and then restart your computer.
- Uninstall any other applications that use icon overlays such as DROPBOX
https://support.microsoft.com/en-gb/kb/3079213