I keep getting system problem occured

Almost every minute Ubuntu 16.04 pops out windows saying System error occured. Do you want to send this prob
Specs:
AMD Athlon II X2 220 @ 2,8 GHz
4 GB DDR3 SDRAM
NVIDIA GeForce 9600 GT 512 MB (PNY)
450W PSU
Ubuntu 16.04.3 LTS
7200 RPM 500 GB HDD
c 24 11:09:06 otto-G5239sc-m rsyslogd: [origin software=“rsyslogd” swVersion=“8.16.0” x-pid=“865” x-info=“http://www.rsyslog.com”] rsyslogd was HUPed
Dec 24 11:09:22 otto-G5239sc-m anacron[869]: Job `cron.daily’ terminated
Dec 24 11:09:22 otto-G5239sc-m anacron[869]: Normal exit (1 job run)
Dec 24 11:11:07 otto-G5239sc-m com.canonical.Unity.Scope.Applications[1617]: Error loading package indexes: Couldn’t stat ‘/var/cache/software-center/xapian’
Dec 24 11:11:07 otto-G5239sc-m com.canonical.Unity.Scope.Applications[1617]: (unity-scope-loader:2720): unity-applications-daemon-CRITICAL **: daemon.vala:144: Failed to load Software Center index. ‘Apps Available for Download’ will not be listed
Here is my error logs
My screen also gets flicking and moving -´s on HP boot and ubuntu boot screen
Also monitor is HP s2031a
Anyone have a solution for me? my bios has AMD-V enabled and virtualbox installed

I’ve moved this to the https://community.ubuntu.com/c/support-help-requests category because this site isn’t designed to take tech support questions. Sorry. I’d recommend using one of the official support channels listed on the https://community.ubuntu.com/t/finding-help/712 page.