Since you are not using Bootcamp this falls on both VMWare and Microsoft to solve. HOWEVER a common problem of updates and installs has to do with antivirus protection suites.
For me, I have no qualms or other issues with removing such things if I feel they are getting in the way.
SADLY I'm a programmer (embedded, assembler, too many OSes and a hardware designer) so I might be able to help if I saw it first hand. But given only the story you have to call both companies now.
I have Windows 7 installed on an Intel MacBook (4GB of memory) running the latest version of VMWare.
I had my university technical support group do the install of VMWare and Windows 7 to ensure that everything worked well together. Initially everything seemed fine - I could log in to Windows 7 and use Internet Explorer to access my school's online course management system.
However, when I tried to install MS Office 2010 I ran into persistent failures and the install never completed. Sometimes it rolled back the install; at other times my entire WIN environment froze and I had to Force Quit VMWare. We traced the error messages back and they indicated that an update to Windows 7 had to be installed. However, running the WIN updater just hangs with the progress icon endlessly spinning.
The university's technical support group has thrown up its hands on this problem and finally told me to resolve it myself. I don't know where to start - VMWare or Microsoft?
Your help would be very much appreciated since I have other software, that only runs in a WIN OS, that I need to install.