HELP: Trying to run SupportAssist. Program corrupted?

Hello. I have a Dell XPS8000 running Windows 7. This superb little box needs some help. I have been running the Dell SupportAssist program, and this has been very useful, but today, it won't load properly. The SupportAssist program begins to load, but freezes, with the Windows 'Not Responding' message appearing. I have tried to use the online version of the SupportAssist program, but this locks up in the same way. 

I then downloades the SupportAssist program, but neither of the two options work. One tells me that I don't have the correct interface, the other does nothing. 

I have sought help from the Dell site, but have done something there which led to having to reset my account twice, and now logon page now says that my details are incorrect!! I don't have much hair left, but am considering pulling out the small remaining amount. 

Can anyone point me to a download for the Support Assist program please?

Kind regards.