Having two resident scanners installed on the same system isn’t recommended.
If you are running two resident scanners especially NAV then avast is likely to disable elements to avoid a conflict and possible lock-up of your system.
You need to decide which AV to keep as your resident and completely remove the other and NAV can be a pig to remove.
Send a sample of winrge32.dll to avast in a zipped password (virus will do) protected email to virus @ avast.com (without the spaces) giving a brief outline of the problem, ‘undetected trojan’ or you can add it to the User Files section of the chest and send it from there.
This "trojan" is primarily SPYWARE & an antiSPYWARE
program is needed to quarantine it as well as "detect"
it. Did you do a "Google search" for "Trojan.Nebuler" BEFORE coming here ? I just did & the 5th listing was about research done by Sunbelt Software, the makers of the CounterSpy
antispyware product; it appears to be in THEIR database and they offer a FREE 15-day “trial” of the program, available at : www.sunbelt-software.com/CounterSpy.cfm . It would seem using their program would be the easiest way to rid yourself of it;
could uninstall the program before the end of the 15-day period, but I do NOT know what happens AFTER the “trial” ends !?