My PC is a Toshiba M645 laptop(Win 7 64). I got a update for my MS Security Essentials yesterday. After that I restarted my system and I was unable to log on to system. I can come up to login screen where I can enter password. But after entering password nothing happens when I hit enter or click go button. It isn't stuck there, because I can restart my pc using restart button. After that I boot pc with safe mode and I was able to login. Then I restored pc to a previous version and after that I was able to log in normally. I disabled that update because I thought that was causing this error. After that I installed COMODO firewall and it request a restart so I restarted system. But again I was unable to login to the system. Then again I go to Safe mode and tried disabling all start-up items and services but no use. I tried registry cleaning using CCleaner and it is also no use. Only working thing is system restore. But after a restore also I cant install COMODO. When the login is not working, I can see my hdd bulb is blinking rhythmically. What is causing this error? How can I resolve this.
Thanks!
Thanks!