G'day,
I'd send a detailed email to support[ at ]comodo.com on this issue. Please include, if possible, a screen shot of the any error messages you receive along with any technical details you feel may help the support guys.
Hope this helps,
Ewen :-)
Thank you for reply!
Not so much information

Earlier I got the first of attached messages and now (after update) another two.
logs of proxy say:
http://antivirus.comodo.com/cavupdates/EmgSer.iniand
http://antivirus.comodo.com/cavupdates/server.iniSome of subdirectories of installation are read only
That is all