PC Tuneup is hung up scanning and repairing drive C

Hello Fred. I apologize for the inconvenience caused. I kindly request you to have a look at this article http://avgread.me/1f5JYjW to proceed with the scanning. Thank you.

AVG Ultimate PC Tuneup is hung up "Scanning and repairing drive (C:): 10% complete" for 4 hours. Windows 8.1, Lenovo C50-30 with Intel i3. Esc and Ctrl+Alt+Del do nothing. If I hold the power button until it powers off, when I power it back on, it just continues doing the same thing.

Hello Fred. I apologize for the inconvenience caused. I kindly request you to have a look at this article http://avgread.me/1f5JYjW to proceed with the scanning. Thank you.