yuena91,
First update to the latest version and see if that solved the problem:
https://forum.avast.com/index.php?topic=166883.0If not:
- Boot the system and wait e.g. 30 minutes.
- Do nothing on the system in that time, just let it boot/run
- Is the cpu usage normal after this time ?
If so:
- Boot the system
- Open as soon as you can taskmanager (ctrl-alt-del) and check if there is a instance of svchost using a lot of cpu time
- If it is, check what process it is hosting.
- If it is dnsrslvr, shutdown that instance of svchost.
- cpu usage should be going back to normal
old_nerd,
please start your own thread and provide details.
Although the symptoms are the same, it doesn't mean the cause of it is.