Windows Vista Windows host (rundll32) not working

I have Windows Vista home Prem 2007 32 bytes with service pk 2. I am also running EI8. I have emboirdery designs that I can no longer open from windows explorer nor do I see the icons of all the designs, I have an embird iconizer. When double click the design I get the open with windows. It should go directly to the system that opens the design. Now I get error message that windows host process stopped working. I should mention I was locked out of my computer as admin and had to go to dell support. that's when I started having problems. Dell will not helping saying its a software issue and I need to talk to the suppliers. No help there.
Problem signature
Problem Event Name: APPCRASH
Application Name: rundll32.exe
Application Version: 6.0.6000.16386
Application Timestamp: 4549b0e1
Fault Module Name: ntdll.dll
Fault Module Version: 6.0.6002.18005
Fault Module Timestamp: 49e03821
Exception Code: c0000005
Exception Offset: 0000e060
OS Version: 6.0.6002.2.2.0.768.3
Locale ID: 1033

 

I am reporting my problem in Malware section. I feely dont know what type of malware I have if any. So I am using what I see as the problem since i dont know the cause of it.