4.1

[igor]

Actually, the things written above are true - when you schedule the boot-time scan for the second time, it is canceled.
However, your registry keys got corrupted somehow (probably some other program (maybe already uninstalled) left in in a "bad" state).
Now, when everything's OK, you can try it again - scheduling the boot-time scan makes it perform only once. If you schedule it twice (before restarting), the boot-time scan is canceled and not performed at all.

[Lisandro]

However, your registry keys got corrupted somehow (probably some other program (maybe already uninstalled) left in in a "bad" state).

A little off-topic but, igor, could this thing happen with the keys:
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\VirtualDeviceDrivers]"VDD"
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\VirtualDeviceDrivers]"VDD"
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet001\Control\VirtualDeviceDrivers]"VDD"

when avast! is installed concurrent with Norton Utilities and Norton Cleansweep. The entry for avast! repeats like a loop:

C:\ARQUIV~1\Symantec\S32EVNT1.DLL
C:\Arquivos de programas\Avast\aswMonVd.dll
C:\Arquivos de programas\Avast\aswMonVd.dll
C:\Arquivos de programas\Avast\aswMonVd.dll
C:\Arquivos de programas\Avast\aswMonVd.dll
...

Strange  

[igor]

Hmm, I don't know... what is the type of the values? I believe this problem occurs only with REG_MULTI_SZ items...

[Lisandro]

Hmm, I don't know... what is the type of the values? I believe this problem occurs only with REG_MULTI_SZ items...

Yeah, bingo! REG_MULTI_SZ...
If you correct it I'll be happy  

[pmac]

A side note that maybe of help is that I had norton systems installed about 3 months ago. I had some problems with it and removed it from the computer. When I was installing Avast it told me norton was still there. I used find in regedit to find the entry. I found a total of 30 different line entries that I deleted. That could be what caused my problem.

Anyway it is fixed now. Thanks for all your help.

cheers   mac        

[Lisandro]

A side note that maybe of help is that I had norton systems installed about 3 months ago. I had some problems with it and removed it from the computer. When I was installing Avast it told me norton was still there. I used find in regedit to find the entry. I found a total of 30 different line entries that I deleted. That could be what caused my problem.

Anyway it is fixed now. Thanks for all your help.

cheers   mac        

Yeah, we know Norton mess everything. You can read more here. Take a deep breath!