I can not uninstall avast free verison from my pc. and it is not running
follow instructions on website
uninstall with this and reboot http://www.avast.com/en-eu/uninstall-utility
install again and reboot
OBS: important, alway remove previous used AV before installing a new…if you did not
use a removal tool to clear any leftover files that may conflict
run and reboot - Uninstallers - Security software http://singularlabs.com/uninstallers/security-software/
Pondus I thank you very much it worked and had been driving me nuts. 
your wellcome 
just curious…what worked… you did it all or ?
The 1st link was the http://www.avast.com/en-eu/uninstall-utility. I was surprised because I got parts of it deleted and was try to use reg edit to no avail because of the write protection. I use avast, and malwarebytes and Ccleaner, all the free versions and they have kept this 10yr old desk top pretty snappy. I have the Verizon fios for internet and it really has a steady speed. Usually 38 to 40 mbs on dwn load and 24 to 28 mbs on upload.
What if my computer will not go into safe mode? I can’t run the utility because I can’t get my computer to boot into safe mode. Are there any other options to uninstall? I can’t even do a system restore because it tells me that my antivirus software is blocking it from doing so, even after disabling the avast anti virus.