keeps on crashing ...

[RHF91]

dear sirs
I am new to CentOS, and not very much welcome by my PC.
It keeps on crashing. Nine times at least today (screen freezes, ctrl+alt+backspace won't work, mouse and keyboard lost power, ...)
These are the logs I collected, do you have any idea to help me ?
Thank you very much in advance for your time.
Best regards
Roberto

[rfranco@Host-001 ~]$ su root
Password:
ABRT has detected 6 problem(s). For more info run: abrt-cli list --since 1526922341
[root@Host-001 rfranco]# ^C
[root@Host-001 rfranco]# abrt-cli list --since 1526922341
id cf4b6b78d353becaf6f953019fafcba4961a8d30
reason: WARNING: CPU: 0 PID: 0 at arch/x86/mm/ioremap.c:115 __ioremap_caller+0x179/0x340
time: Mon 09 Jul 2018 01:09:29 PM CEST
cmdline: BOOT_IMAGE=/vmlinuz-3.10.0-862.2.3.el7.x86_64 root=/dev/mapper/centos-root ro crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet LANG=en_US.UTF-8
uid: 0
Directory: /var/spool/abrt/oops-2018-07-09-13:09:29-922-0

id 0c79e914429a48b8c090db1c14f20ab276727834
reason: WARNING: CPU: 0 PID: 0 at arch/x86/mm/ioremap.c:115 __ioremap_caller+0x179/0x340
time: Mon 09 Jul 2018 11:53:13 AM CEST
cmdline: BOOT_IMAGE=/vmlinuz-3.10.0-862.2.3.el7.x86_64 root=/dev/mapper/centos-root ro crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet LANG=en_US.UTF-8
uid: 0
Directory: /var/spool/abrt/oops-2018-07-09-11:53:12-934-0
Reported: cannot be reported

id a5af51f0b030f72e1b6e8352e798e02773b7c349
reason: WARNING: CPU: 0 PID: 0 at arch/x86/mm/ioremap.c:115 __ioremap_caller+0x179/0x340
time: Mon 09 Jul 2018 11:44:23 AM CEST
cmdline: BOOT_IMAGE=/vmlinuz-3.10.0-862.2.3.el7.x86_64 root=/dev/mapper/centos-root ro crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet LANG=en_US.UTF-8
uid: 0
Directory: /var/spool/abrt/oops-2018-07-09-11:44:23-963-0
Reported: cannot be reported

id 3de9a98ce01d3c3c3df30a8da75c215c436f4b1e
reason: WARNING: CPU: 0 PID: 0 at arch/x86/mm/ioremap.c:115 __ioremap_caller+0x179/0x340
time: Mon 09 Jul 2018 10:08:02 AM CEST
cmdline: BOOT_IMAGE=/vmlinuz-3.10.0-862.2.3.el7.x86_64 root=/dev/mapper/centos-root ro crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet LANG=en_US.UTF-8
uid: 0
Directory: /var/spool/abrt/oops-2018-07-09-10:08:01-935-0
Reported: cannot be reported

id 606a754ceedf68b36aeaf41c4539dfe840796809
reason: WARNING: CPU: 0 PID: 0 at arch/x86/mm/ioremap.c:115 __ioremap_caller+0x179/0x340
time: Sun 08 Jul 2018 04:33:16 PM CEST
cmdline: BOOT_IMAGE=/vmlinuz-3.10.0-862.2.3.el7.x86_64 root=/dev/mapper/centos-root ro crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet LANG=en_US.UTF-8
uid: 0
Directory: /var/spool/abrt/oops-2018-07-08-16:33:16-921-0
Reported: cannot be reported

id 9462ce158cb4f9202ac513ca27b827d34ccb33f6
reason: WARNING: CPU: 0 PID: 0 at arch/x86/mm/ioremap.c:115 __ioremap_caller+0x179/0x340
time: Tue 22 May 2018 12:20:32 PM CEST
cmdline: BOOT_IMAGE=/vmlinuz-3.10.0-862.2.3.el7.x86_64 root=/dev/mapper/centos-root ro crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet LANG=en_US.UTF-8
uid: 0
Directory: /var/spool/abrt/oops-2018-05-22-12:20:31-917-0
Reported: cannot be reported

[rfranco@Host-001 ~]$ su root
Password:
ABRT has detected 1 problem(s). For more info run: abrt-cli list --since 1531144004
[root@Host-001 rfranco]# abrt-cli list --since 1531144004
id 104927a3fcfc723d2e5f4f09b2b225940db9cf09
reason: WARNING: CPU: 0 PID: 0 at arch/x86/mm/ioremap.c:115 __ioremap_caller+0x179/0x340
time: Mon 09 Jul 2018 04:30:41 PM CEST
cmdline: BOOT_IMAGE=/vmlinuz-3.10.0-862.2.3.el7.x86_64 root=/dev/mapper/centos-root ro crashkernel=auto rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet LANG=en_US.UTF-8
uid: 0
Directory: /var/spool/abrt/oops-2018-07-09-16:30:41-956-0

[root@Host-001 rfranco]#