28GB disk space runs out in an hour

O.o Thats alot of processes.....

As a precaution try running a malware scan using www.malwarebytes.org and see if anything comes up.

Okay..... well tracertp.exe.... Kill that one

Click the activity drop box and check the system box that should tell you everything running as system... and go ahead and grab a snapshot of cpu and network

Its an event trace report tool.... idk how it got turned on that's why i suggested checking network traffic. When I keep 3 gadgets open at all times, cpu meter, network meeter, and disk meter. If something starts to spike I investigate unless im doing something were it should....

I would look at your MSconfig.. Run Malwarebytes and I will have too suggest that and Microsoft security essentials over avast.

Make sure there are no nasties lurking around....