my avast home edition froze i deleted as it would not respond at all when i went to reinstall it wont. i think the problem has to do with the avast icon on my bar its still there as it didnt delete. i have tried to delete but wont delete im stuck i want my avast anti virus back but wont reinstall comeup with error every time 
Megplum welcome to Avast! Forum.
What OS, Spk, Bit ?
What Avast! and version ?
Other security programs ?
What is the error ?
Install from scratch:
1.) Very important to remove all remains of other AVs installed before Avast. Use this site to execute uninstall utilities for other AVs.
http://singularlabs.com/uninstallers/security-software/
2.) Download and save to your desktop aswclear : http://www.avast.com/uninstall-utility
3.) Download and save a fresh copy of Avast!. Be sure to have your lincense handy if running a paid version.
http://files.avast.com/iavs5x/avast_free_antivirus_setup.exe
http://files.avast.com/iavs5x/avast_pro_antivirus_setup.exe
http://files.avast.com/iavs5x/avast_internet_security_setup.exe
4.) Open Avast! > Settings > Troubleshooting > Untick " Enable Avast! self-defense module ".
5.) Uninstall Avast! normally through Control Panel > Programs & feature ( Vista, W7 ) or Add and remove programs ( XP ). Reboot. If you can not complete this step, continue with step # 6
6.) Even if you were able to uninstall Avast! in step # 5, it is important to run aswclear.exe in safe mode for any Avast! you may have had before and then for v. 7. Reboot into normal mode after uninstall.
https://support.avast.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=1062#idt_02
7.) Reinstall fresh copy of Avast! and reboot.
Be aware. Avast! will offer Chrome during installment. Remember to opt-out if you do not want it.
You can watch a helpful video at:
http://youtu.be/KJcfAZHGRHE