can't get into websites that need passwords

i just downloaded avast!4.xhome/pro last night. I did the virus scan and it detected 62 viruses and i deleted those files that were infected. Now when i go on internet explorer certain sites that i have my personal information on and requires a password, it won’t let me even get to those sites. Does anyone know what to do about this.

Hiitteman

First let us make sure that your system is really clean.
Please read and follow the instructions on THIS PAGE