I can't get any further than entering my main computer password.

[Missy1]

Hello, I have an Acer Aspire 5742 with Windows 7. Everything was working fine till about 3 hours ago. Once I've entered my  computer login password, I get a brief flash of my desktop screen then the whole screen is replaced with a 'This programe cannot display the webpage' even though I am not trying to access the internet.  I have tried ctrl/alt/del to take me off that screen and attempted to start task manager. I am unable to access task manager. I have tried restarting but the same thing happens each time. I'd really appreciate any help, thankyou.

[yesterday]

Have you recently installed any new programmes? Try booting into safe mode and from there run a virus scan and see what happens. From safe mode you can also carry out a system restore if the scan does not fix it.