Bootcamp disk partitioning is stuck

Hello. I'm trying to install windows 10 using bootcamp on a iMac with High Sierra.

My equipment specs are:

iMac (21.5-inch, Late 2013)

3,1 GHz Intel Core i7

8 GB 1600 MHz DDR3

Macintosh HD

VIDIA GeForce GT 750M 1024 MB

The attached image shows that the partition progress has not finished.

But it has not progressed during the last 12h.

By means of the terminal and command "diskutil list" I get the following info:

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage Macintosh HD 858.2 GB disk0s2

3: Apple_Boot Recovery HD 650.1 MB disk0s5

4: Microsoft Basic Data BOOTCAMP 141.1 GB disk0s4

/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage Macintosh HD 121.0 GB disk1s2

3: Apple_Boot Boot OS X 134.2 MB disk1s3

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +973.0 GB disk2

Logical Volume on disk1s2, disk0s2

2E2AFAA0-8B43-4958-BFB9-244353473B92

Unencrypted Fusion Drive

/dev/disk3 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *16.0 GB disk3

1: DOS_FAT_32 WININSTALL 16.0 GB disk3s1

/dev/disk4 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: ESD-ISO +4.1 GB disk4

/dev/disk5 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: Boot Camp +2.8 GB disk5

Can anyone help? I'm a very simple user of iMac. I do not know much about the SO and functionalities.

Thanks.

Manuel