Cannot Access the Recovery Partition

My dell laptop has been attacked by many kinds of computer viruses because of the different untrusted sites that my kids have visited. And so, I used anti-virus software to remove the viruses on my laptop. When I opened my laptop a day after, I was surprised with this error message that appeared on the screen “"Interactive logon process initialization has failed. Please consult the event log for more details.” I tried booting it many times and sometimes it directed me into Safe Mode, Safe Mode With Networking, and Normal Mode options.
However, I can reach the Recovery Partition, can click the load drivers, but I cannot access any of them. I tried each option but the same error had occurred. Sometimes I got this error message “Missing File: Windowssystem32winload.exe.” Were the many attempts of virus removal the main cause of this problem?
Please help me. Thank you.
Interactive logon process initialization has failed. Please consult the event log for more details and Missing File: Windowssystem32winload.exe.
