Verified answer

You have it set to backup changes.

Yes, it is definitely a trojan horse, I solved a couple of PC with the same behaviour and found it to ba a new trojan horse. You can download the free Malware scanner from malwarebytes.org.

sounds like you have a trojan virus, some trojan viruses fill your hard drive up by keep copying all the files on the hard drive until it becomes full eventually crashing the system completely

i use same program

you have it set for backups,i agree with tater...

also it is NOT a virus.ppl don't know the whole definitions of a virus.