Is there any hope?

So, before I left for vacation I updated Avast and then it found several ? viruses? So I thought I should not leave this as is…so I put them in the chest. It showed viruses…but I think they were in a Windows file…i.e. something really important for operating system. So then after that, when I turn on computer , I get to choose my name and it shows loading your personal settings…but nothing happens. No boot up or anything after that. (I am currently using husband’s computer with Japanese operating system. Not great but at least I am able to check email etc.)
So is my computer dead? should I buy a new one or is there somthing I can do at this point to retrieve it. Computer is five years old but is a TOshiba M65-S8092… There is some sort of “return to previous date” function but I can’t get to that now. Help?

Can you boot in Safe Mode? Or in the “Last known good configuration”?
http://support.microsoft.com/kb/307852/en-us
http://windows.microsoft.com/en-US/windows-vista/Using-Last-Known-Good-Configuration

I’m going to jump in here and say that the same thing is happening on my WinXP x64 machine.

I can boot into Safe Mode and I have used MSCONFIG to turn off all services and turn them all back on one-by-one (that was a lot of reboots!) until I narrowed it down to the Avast service.

So far, I have got around it by booting into Safe Mode, opening Administrative Tools → Services, right-clicking the Avast service, going to its Properties screen and setting its Startup Type to Manual.

Now the machine will allow me to login but, obviously, Avast is not running. To get around this, I right-clicked my Start Menu, chose Open All Users and navigated to Programs, then Startup. Then I right-clicked in the Explorer window, and chose New → Shortcut. In the wizard, I entered [C:\Windows\System32\net.exe start “avast! Antivirus”] (without the [square-brackets] but with the “double-quotes”), then Next/OK’d the shortcut until it was finished.

Now, I can log in and the Avast service starts up shortly after I do. This is, of course, not ideal; there are obviously viruses that would start long before this.

If the Avast team would like me to send any logs, etc, that might help them diagnose this, please let me know via this thread.

J.