I got this problem when I turned on my computer last Friday when the regular anti-virus scan was scheduled (coincidence?). Windows (XP) would not load in any mode except safe (without networking), and McAfee Scan facility would not function bringing the error message and telling at the same time that my system is not safe (on the home screen). Virus suspected, but how can I scan my computer without access to Internet?
OK, somehow I've been able to run the computer in regular mode (there seems to have been a hardware error), but McAfee Security Center keeps telling me that I am not protected, and when I press the FIX button, it scans for a while and then tells me: "One or more problems cannot be fixed because of an error". The main screen contains following information: "Click FIX and we'll resolve these problems for you: - Real-Time Scanning is disabled. - Spyware and potentially unwanted program scanning is disabled. - IM [what is IM?] scanning is disabled. - Script Scanning is disabled. (Ignore) - Buffer overflow protection is disabled.
Computer and Files -- Action required Internet and Network -- Protected E-mail and IM [what is IM?] -- Action required Parental Controls -- Enabled"
Just as I was writing this message, the Security Center main screen changed and now it says: "Click FIX and we'll resolve these problems for you: - Some components are missing. Please reinstall McAfee Virus Scan".
Another thing for your information. When I was able to run computer only in safe mode, I tried to virus-scan, and received the following error message: "Scanning has encountered a problem from which it cannot recover. Here are the problem details: - scan failed to start; result = -2147467259 When finished, you will return to the Home window".
Hope the above has been of some information for you.
I have personally tested and verified a similar (or the same!) issue. The problem is caused with a compatibility problem with the newest scan engine and the DATs. This has been reported and is being looked into (as of Tue, Apr 28, 2009) for a fix as the problem may entend to all McAfee products using the McAfee scan Engines and DATs.
The first errors you received with a lot of the protection status options off usually happen when the engine can not load. In the version I tested the other day(12.1), this seemed to be happening because of the DAT/Engine error. The program tries to query the engine to get information but it fails. When it does, the update process never completes and may delete the old dats without installing new ones as well as providing incorrect registry settings (which screw up the updater).
The 2nd error where a component is missing deals with the engine, dat, or buffer overflow dat files. In my experience, it's been because of a missing vscan.bof file (should be in the VirusScan folder). However, if you were able to get the engine to load randomly, the updater will start working on its own and download/create the missing file automatically within a few minutes.
Whatever the case, this is a *bug* that has affected many users and hopefuly there will be a patch or update soon to resolve it.
In the meantime, if you just want to verify a fairly virus free system, try this scanner. You can run it in Normal mode or Safe mode with Networking. An Internet Connection is required to download the program and its updates. It's pretty small, fast, and effective and will be able to remove threats found.
Thanks for your help. I think that the system crash may have been caused by this bug which affected the regular virus scan scheduled for that day (originally I had seen the "your computer is not protected" message the day before and had hoped that it would resolve itself when I reboot my computer the next day) and malfunctioning of my hardware. So, what shall I do now - click FIX, re-install the Security Center manually, or just wait for the eventual update? What if next Friday when the regular virus scan is scheduled, the system will again crash due to the bug in the VirusScan component of the security center?
As for the ESET Online Scanner, I tried to run it, and it (of course) found another anti-vurus program (McAfee) which "may affect its speed and effectiveness". What shall I do - just run the ESET Online Scanner, or disable McAfee first?
P.S. Having not received the answer yet, I ran the ESET Online Scanner "as is", i.e. with the McAfee enabled, and have received the following results: H:\Program Files\MyCentria\MyCentriaUninstall.exe Win32/Adware.Mycentria application cleared by means of deletion - isolated H:\Program Files\MyCentria\Firefox\InstallerFF.exe Win32/Adware.Mycentria application cleared by means of deletion - isolated (not sure about literal words; the program ran in Russian)
By the way, I am not able now to access some web sites (like Hotmail, for example, banks and others, requiring securuty certificate). Internet Explorer tells me that its (e.g. Hotmail's) security certificate "is out of date or has not begun yet", which means that "someone is trying to deceive me or track the information sent to this server". Does it mean that there is still some threat or does it just indicate that McAfee is not functioning properly?