hello
the problem is fixed now.
i scanned my pc with av and i qurantine virus. and after quarantine opera worked.
i got question that is it because of virus in my pc? if it is because of virus then why other browser like internet explorer and chrome was working fine? but not opera
only opera was showing that problem.
the virus detected in m pc were trojan,adware and pup
but all of them not in c drive. but all of them founded from f and g drive.
thank you