vSphere 5.1 Client Hangs when loading DC's and stops responding

I was using the 5.1 vSphere client on my PC without any issues. I installed the update manager plug in and then started having problems. We have vCenter set up so that three DC's are linked together.

When I bring up the client and log in like normal only the one DC loads that I logged into and then the client hangs and I can't click on anything, even after waiting over 20 minutes. I have to bring up task manager and kill the process to get it to close. It works fine from a different PC, just hangs on my PC.

I removed the 4.1 and 5.1 clients, reset, reinstalled 5.1 after downloading it from a ESX server, reset, and still hangs and I have to kill the process to close the window.

Anyone have any ideas what is going on or how to fix it so the client works fine? Do I need to do a deeper scrub when removing the client?
REIUSAAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
it's not waiting for an Update Manager certificate which is being presented to your PC, and asking a question to trust?
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REIUSAAuthor Commented:
I don't get any other windows popping up or certificate messages. After the reboot I logged on and let it sit for about 30 minutes and it just hung.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Can you access via Web Client ?

Does the vSphere Client do this on ALL Windows workstations ? can you try another.
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REIUSAAuthor Commented:
Web client works ok. And it is just from my PC. I logged on to another machine we use and was able to log in with the local client.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Oh, if would appear that your vSphere Client and .NET and C# framework is corrupted on that workstation.
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REIUSAAuthor Commented:
Thank you Sir. I removed everything with .net in it and all the vmware software and reinstalled and so far it is working from my machine.
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