Solution to your problem,... and it worked for me;
1) Right-click the drive that has got a changed icon,
2) Properties,
3) Click 'Tools' tab,
4) On "Check Erros" section, click "check now" button...
Wait until the process is complete, and you are done.
In my case, my Operating System is in Portuguese, so the steps are;
1) Clique com lado direito do mouse na Unidade,
2) Propriedades,
3) clique na aba "Ferramentas",
4) Na "Verificação de Erros", clique no botão "Verificar agora"...
Espere até que o processo termine!