Posted 19 March 2012 - 07:22 AM
Win 7 professional 64 SP1 all patches applied till today.
Some days ago I got a Definitions Update, like many others before.
But this time it failed to apply with an numeric code.
Since I don't have MS Security Essentials (never installed it for what I can recall) and just have free Avira, Spyware Blaster and Malware Bytes, it should not be disabled or something.
After reading a number of posts on the MS forums I tried manually starting the defender service, which failed with error 126 (could not find its mpsvc.dll DLL).
I noticed the required DLL, along with a couple others, was in Program Files, while the registry entry for it was set to %ProgramFiles (86)%\Windows Defender\mpsvc.dll.
Not willing to fiddle with the registry, I just applied a .reg fix others on the MS support forums found useful to fix this issue with.
But it did not help. The definitions update indeed worked but now the defender service won't start at all and shows as disabled (trying to start it does nothing, no error, no Windows logs in events viewer.
What I get now is: "<Impossibile leggere la descrizione. Codice di errore: 1168 >" which translated is "Unable to read the description. Error code:1168"
for executable path C:\Windows\System32\svchost.exe -k secsvcs
The %ProgramFiles (86)% and %ProgramFiles% are (correctly) located in E:
I already ran the command line MS utility that scans the system files and also the MS 310MB general fix-it-all patch whose name I don't remember now.