I don not know how to run and uninstall in safe mode.I use win 7 utimate 32 bit.
pl help me.
Download the latest stable setup program for Avast again, from the Avast website only.
Download the Clean Uninstall Utility for Avast from
http://www.avast.com/uninstall-utility.
Reboot into
Windows Safe Mode (F8 when booting) and run the Clean Uninstall Utility you just downloaded.
Once the uninstallation finished, reboot into Windows
Normal Mode and run the setup for Avast. Please reboot when the setup finished.
After that, you certainly should scan your system with Avast.