I'm experiencing a very odd and blocking problem: was mining with CGMINER 3.1.0 on Radeon HD 5750, never had problem, with SHA256 nor Scrypt, all was fine.
At some point I tried
CGMINER 3.2.0 and it
crashed at start (could only see one line "Started CGMINER 3.2.0" and then crashed).
The odd thing is that from that point over even
all other versions of CGMINER do the same!!! I cannot anymore use CGMINER! I've tried with 3.1.1 (that I'm succesfully using on another PC):
crash. 3.1.0 that was working well before:
crash. Today I tried even 3.2.1:
crash.
I did a Dr. Mingw debug for you, hoping to understand what the hell is happening.
cgminer.exe caused an Access Violation at location 004312d2 in module cgminer.exe Reading from location 072ff1d3.
Registers:
eax=76709102 ebx=0445fd14 ecx=00000000 edx=00000000 esi=0445fc80 edi=00000000
eip=772de1a4 esp=0445fb58 ebp=0445fcd8 iopl=0 nv up ei pl nz na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202
Call stack:
772DE1A4 ntdll.dll:772DE1A4 ZwWaitForMultipleObjects
76AE6AEB KERNEL32.DLL:76AE6AEB WaitForMultipleObjects
0045A362 cgminer.exe:0045A362
0045ACD7 cgminer.exe:0045ACD7
Registers:
eax=00000000 ebx=7fffffff ecx=00000000 edx=00000000 esi=ffffffff edi=0097c6d8
eip=772ddc34 esp=04d5f998 ebp=04d5f9d8 iopl=0 nv up ei pl nz na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202
Call stack:
772DDC34 ntdll.dll:772DDC34 NtWaitForSingleObject
71F78599 mswsock.dll:71F78599 Tcpip4_WSHGetWildcardSockaddr
75140CCF WS2_32.dll:75140CCF select
0041C6B8 cgminer.exe:0041C6B8 socket_full util.c:1057
0041C6FD cgminer.exe:0041C6FD sock_full util.c:1069
0040F6B0 cgminer.exe:0040F6B0 stratum_rthread cgminer.c:4962
00459F25 cgminer.exe:00459F25
7670906A msvcrt.dll:7670906A _ui64tow
76709147 msvcrt.dll:76709147 iswalnum
76AE8543 KERNEL32.DLL:76AE8543 BaseThreadInitThunk
7730BF39 ntdll.dll:7730BF39 RtlInitializeExceptionChain
7730BF0C ntdll.dll:7730BF0C RtlInitializeExceptionChain
XXXXXXXXXXXXXXXXXXXXXX
Registers:
eax=072ff1cf ebx=02008668 ecx=ffb8e50d edx=00000008 esi=01ff2e68 edi=02007c6a
eip=004312d2 esp=0028f4e0 ebp=0028f548 iopl=0 nv up ei pl nz na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010202
Call stack:
004312D2 cgminer.exe:004312D2 patch_opcodes ocl.c:178
004333EF cgminer.exe:004333EF initCl ocl.c:738
00430218 cgminer.exe:00430218 opencl_thread_prepare driver-opencl.c:1332
00419410 cgminer.exe:00419410 main cgminer.c:7691
004010B9 cgminer.exe:004010B9 __mingw_CRTStartup crt1.c:244
00401284 cgminer.exe:00401284 WinMainCRTStartup crt1.c:274
76AE8543 KERNEL32.DLL:76AE8543 BaseThreadInitThunk
7730BF39 ntdll.dll:7730BF39 RtlInitializeExceptionChain
7730BF0C ntdll.dll:7730BF0C RtlInitializeExceptionChain
Registers:
eax=00000000 ebx=00000000 ecx=00000000 edx=00000000 esi=00000002 edi=0097afe0
eip=772df6b4 esp=048dfdec ebp=048dff84 iopl=0 nv up ei pl nz na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202
Call stack:
772DF6B4 ntdll.dll:772DF6B4 ZwWaitForWorkViaWorkerFactory
76AE8543 KERNEL32.DLL:76AE8543 BaseThreadInitThunk
7730BF39 ntdll.dll:7730BF39 RtlInitializeExceptionChain
7730BF0C ntdll.dll:7730BF0C RtlInitializeExceptionChain
Registers:
eax=00000000 ebx=00000000 ecx=00000000 edx=00000000 esi=0469fe6c edi=00001cb4
eip=772ddc34 esp=0469fe28 ebp=0469fe90 iopl=0 nv up ei pl nz na po nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000206
Call stack:
772DDC34 ntdll.dll:772DDC34 NtWaitForSingleObject
753A10B4 KERNELBASE.dll:753A10B4 WaitForSingleObject
0FB90B1B amdocl.dll:0FB90B1B clGetSamplerInfo
0FB872A7 amdocl.dll:0FB872A7 clGetSamplerInfo
0FB87456 amdocl.dll:0FB87456 clGetSamplerInfo
0FB84362 amdocl.dll:0FB84362 clGetSamplerInfo
0FB96FD6 amdocl.dll:0FB96FD6 clGetSamplerInfo
76AE8543 KERNEL32.DLL:76AE8543 BaseThreadInitThunk
7730BF39 ntdll.dll:7730BF39 RtlInitializeExceptionChain
7730BF0C ntdll.dll:7730BF0C RtlInitializeExceptionChain
Registers:
eax=00000000 ebx=04b1f8a4 ecx=00000000 edx=00000000 esi=04b1f810 edi=00000000
eip=772de1a4 esp=04b1f6e8 ebp=04b1f868 iopl=0 nv up ei pl nz na po nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000206
Call stack:
772DE1A4 ntdll.dll:772DE1A4 ZwWaitForMultipleObjects
76AE6AEB KERNEL32.DLL:76AE6AEB WaitForMultipleObjects
0045A362 cgminer.exe:0045A362
0045ACD7 cgminer.exe:0045ACD7
753AEE71 KERNELBASE.dll:753AEE71 CreateEventExW
753AEE8C KERNELBASE.dll:753AEE8C CreateEventExW
753B3BFE KERNELBASE.dll:753B3BFE CreateEventExA
00458630 cgminer.exe:00458630
0041BD00 cgminer.exe:0041BD00 tq_pop util.c:769
0040F9D0 cgminer.exe:0040F9D0 stratum_sthread cgminer.c:5053
00459F25 cgminer.exe:00459F25
7670906A msvcrt.dll:7670906A _ui64tow
76709147 msvcrt.dll:76709147 iswalnum
76AE8543 KERNEL32.DLL:76AE8543 BaseThreadInitThunk
7730BF39 ntdll.dll:7730BF39 RtlInitializeExceptionChain
7730BF0C ntdll.dll:7730BF0C RtlInitializeExceptionChain
Registers:
eax=76709102 ebx=6b619070 ecx=00000000 edx=00000000 esi=029afe90 edi=00000000
eip=772de1a4 esp=029afd68 ebp=029afee8 iopl=0 nv up ei pl nz na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000202
Call stack:
772DE1A4 ntdll.dll:772DE1A4 ZwWaitForMultipleObjects
76AE6AEB KERNEL32.DLL:76AE6AEB WaitForMultipleObjects
6B608229 libusb-1.0.dll:6B608229 windows_clock_gettime_threaded
76709147 msvcrt.dll:76709147 iswalnum
76AE8543 KERNEL32.DLL:76AE8543 BaseThreadInitThunk
7730BF39 ntdll.dll:7730BF39 RtlInitializeExceptionChain
7730BF0C ntdll.dll:7730BF0C RtlInitializeExceptionChain
I hope that someone can lead me to the solution....

I'm now using bitminter java client, but I want a scrypt miner and I like so much CGMINER...!
Thank you in advance to who will reply!
Did you delete bin files? Reset the drivers to USB/COM? If nothing works, re-compile and remove all the fpga stuff.