Hi Mark,
I did tell them about my problem but I doubt if they could catch up. Well, first, because of my kaspersky has been blocked, I was told by kaspersky teams to uninstall the software and reinstall it, and they all told me to remove some registries value as per following:
HKEY_LOCAL_MACHINE\SOFTWARE\KasperskyLab\LicStorag
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography \RNG
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\SPC\Certificates
Accidentally, I did remove some registry values beside those above-given values. As the result, I cannot surf internet using internet explorer 8 in stead of firefox. I am afraid it is because of my fault with accident deletes involved in registry.
Thanks for you value time to help me