I deleted CIS Premium 8.4,that installing new version!When installing new version error pop up with an inscription "old version installed"but i already deleted old version!But some empty comodo folders remained on registry! >:(
Hi, you can use one of these tools to clean all leftovers. I found them useful.
Thanks:)
I tried but the utility was unable to deleting:(Here is screenshot
http://i12.pixs.ru/storage/8/8/6/bandicam20_2434024_24556886.jpg
,
http://i12.pixs.ru/storage/8/8/8/bandicam20_2707663_24556888.jpg
Have you tried the next *.bat file? Using “Run as Administrator” in SAFE MODE. Just to remind, these are not officially removal tools released from Comodo. I found them searching on this forum and on other geek forums.
Another good removal tool come form ESET. This one is official. You can try it, its safe.
http://support.eset.com/kb146/?locale=en_US
Next time i tried in safe mode and it helped!And then i installed new version but antivirus not running:(When starting antivirus error pop up!I clicked yes but nothing happend
http://i12.pixs.ru/storage/6/9/5/bandicam20_5250367_24557695.jpg
I have the same problem on my Win732bit. Maybe a bug. Better to wait for the next hotfix. 
Okay:)