Solved Weird random Defender crashes. Help!

JohnnyGui

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Hey all,

Since yesterday I got these frequent random crashes of the Antimalware Service Executable that is used by Windows Defender. Now I know that Defender isn't the best antimalware program around but still, this shouldn't be happening. The crash occurs randomly while I'm not using Defender. Also, if I want to scan the system with it, an error eventually shows up saying that Defender cannot scan the system because the service has stopped (???).

I don't know what the exact cause is of these crashes. Yesterday I did install a Steam game that needed .net Framework 3.5 and its updates, Visual C++ 2005 and Games for Windows Live client (ugh..). However, I can't make a link between any of these programs and the crashes.

Beneath is the errorlog of the crash (sorry it's in Dutch). I looked for a crashdump but there isn't any.
Bron
Antimalware Service Executable
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Datum
‎10-‎3-‎2013 13:15
Status
Verzonden rapport
Beschrijving
Pad naar toepassing met fout: C:\Program Files\Windows Defender\MsMpEng.exe
Probleem met handtekening
Naam van probleemgebeurtenis: APPCRASH
Naam van de toepassing: MsMpEng.exe
Versie van toepassing: 4.0.9200.16384
Tijdstempel van toepassing: 5010a938
Naam van foutmodule: StackHash_9149
Versie van foutmodule: 0.0.0.0
Tijdstempel van foutmodule: 00000000
Uitzonderingscode: c0000005
Uitzonderingsmarge: PCH_DB_FROM_ntdll+0x000000000000319B
Versie van besturingssysteem: 6.2.9200.2.0.0.256.103
Landinstelling-id: 1043
Aanvullende informatie 1: 9149
Aanvullende informatie 2: 914946ab08ec1f46750302a9dd76049b
Aanvullende informatie 3: 8c8c
Aanvullende informatie 4: 8c8c06723596ffe07b49a172c4f50ee7
Extra informatie over het probleem
Bucket-id: 9e96c8bcb96918d80309c2c949ffdb57 (77715820)

I'm running Windows 8 Pro 64 bit. Further specs are:
CPU 3570K
GTX 660Ti
8GB RAM
1TB HDD

Could anyone please help me with this since I can't scan the system with these crashes.

Thanks in advance,

John
 

My Computer

System One

  • OS
    Windows 8.1 (Update 1) Pro 64 bit
    Computer type
    PC/Desktop
    CPU
    Intel i5 3570K
    Motherboard
    Asrock Pro4 Z77
    Memory
    8 GB
    Graphics Card(s)
    Geforce GTX 660Ti
    Hard Drives
    Hitachi HDS921010DLE630
Thanks a lot guys! Noticed a .1493 version in Windows Update and now the crashes are gone and the scanning is fixed. Should have searched better before posting this. Hopefully Microsoft won't do this again :p
 

My Computer

System One

  • OS
    Windows 8.1 (Update 1) Pro 64 bit
    Computer type
    PC/Desktop
    CPU
    Intel i5 3570K
    Motherboard
    Asrock Pro4 Z77
    Memory
    8 GB
    Graphics Card(s)
    Geforce GTX 660Ti
    Hard Drives
    Hitachi HDS921010DLE630
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