Well the report now is kind of the same as before...
Machine: 'racw', OS ver: 6.1 (build 7601) Service Pack 1
Memory: 3327 MB (used 30%)
Date: 22-9-2011 21:34
Address: 23:6b454ed0, Exception code: c0000005 (ACCESS_VIOLATION)
Registers:
eax = 6b519800, ebx = 6b519885, ecx = 00000000, edx = 00000000
esi = 04e1f700, edi = 05eac002, ebp = 0a74fa40, esp = 0a74fa34
Execution path:
Module: vsfilter.dll
DllGetClassObject, offset 0xf68
DllRegisterServer, offset 0x700
DllRegisterServer, offset 0x3eaae
DllRegisterServer, offset 0x3ea43
DllRegisterServer, offset 0x3e6a3
DllRegisterServer, offset 0x4464b
Module: ntdll.dll
RtlInitializeExceptionChain, offset 0x36
RtlInitializeExceptionChain, offset 0x63
Module: kernel32.dll
BaseThreadInitThunk, offset 0x12
Module: quartz.dll
AMGetErrorTextA, offset 0xd149f
AMGetErrorTextA, offset 0xd0eef
AMGetErrorTextA, offset 0xd0851
AMGetErrorTextA, offset 0xd063f
AMGetErrorTextA, offset 0xc9d
Module: qasf.dll
DllCanUnloadNow, offset 0x261b6
DllCanUnloadNow, offset 0x24869
DllCanUnloadNow, offset 0x2480b
DllCanUnloadNow, offset 0x2431b
DllCanUnloadNow, offset 0x202a
Module: vsfilter.dll
csri_query_ext, offset 0xa1d
DllGetClassObject, offset 0xb89
csri_open_mem, offset 0x72c8
DllGetClassObject, offset 0x1473
DllGetClassObject, offset 0xf68
DllRegisterServer, offset 0x700
DllRegisterServer, offset 0x3eaae
DllRegisterServer, offset 0x3ea43
DllRegisterServer, offset 0x3e6a3
DllRegisterServer, offset 0x4464b
DllRegisterServer, offset 0x430a0
And yeah I've already found the first problem from deleting these files

It's appeared when I wanted to check my Windows Experience Index and it said that the quartz.dll file is missing. But I'll repair that later.
I tried to open the converter after I deleted only the vsfilter.dll but it was again the same.