Dear all (esp. avast! support team)
I've installed Windows XP SP2 with Avast! Pro v4.1.
Before upgrade the Windows XP to SP2, everything work fine including command.com or any 16 bit program like FoxPro 2.6
However, after upgraded the Windows XP SP2. Most 16 bit program not work at all and show NTVDM encounter problem and need to close immediately. At first, I just wonder if it is the problem of WinXP SP2 only. However, after I've search around at Microsoft Knowledge Base. I find one solution.
It seems that some device driver at C:\WINDOWS\SYSTEM32\CONFIG.NT cause this problem.
I've checked my config.nt and find the following line which is added by avast! installation:
device=C:\PROGRA~1\ALWILS~1\Avast4\aswmonds.sys
After I remark (rem) this line, save the config.nt file. All 16 bit program work fine again including my foxpro 2.6 and command.com etc.
So, I think maybe avast! need to work a patch or auto-update to tackle this issue due to the release of Windows XP SP2?
Thank you for your kind attention.