Error; Microsoft Visual C ++ Runtime Library

I have a Toshiba satellite A660 and I can no longer open my hardware setup program. On every attempt An error box titled; Microsoft Visual C ++ Runtime Library, with the words inside the box saying; "This application has requested the runtime to terminate it in an unusual way" appears. Uninstalling and then reinstalling the hardware setup program makes no difference, neither does doing a system recovery or registry clean ups. This appears to be a Windows and not a Toshiba software problem. Can anyone advise, thanks, Jeff

It would seem that its possibly connected to a file in windows system called rundll32.exe but I dont know how to verify or fix that

My Toshiba hardware set up program crashes and I get this error message for it;
Problem Event Name: APPCRASH
Application Name: rundll32.exe_Shell32.dll
Application Version: 6.1.7600.16385
Application Timestamp: 4a5bc637
Fault Module Name: msvcrt.dll
Fault Module Version: 7.0.7600.16385
Fault Module Timestamp: 4a5bda6f
Exception Code: 40000015
Exception Offset: 00056202
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 3081
Additional Information 1: e165
Additional Information 2: e1652446e2a08661f301069e3d3002c2
Additional Information 3: b5d4
Additional Information 4: b5d41abf30ccf3a8321b59a4ced6abd8

Ive done malware and virus checks which come back clear as well as registry clean and defrag.