Excel freezing and Outlook losing Add-in

Question

I am having two issues on a workstation running Office 2013 home and business. The first issue is Excel randomly freezing when opening spreadsheets, it's random and will open two spreadsheets ok and freeze on the third and vice versa, there's nothing wrong
with the spreadsheets. When it freezes it gets to the point where half the excel interface is loaded and locks up (it isn't not responding in Task Manager, still says running) and I have to close Excel and try again.
- Tried full Office repair using online recovery
- Tried different user profile
- Tried opening spreadsheets from a network location and local drive
- There are no errors in the Event logs regarding this at all
- Disabled AV software, all Windows updates installed, still happens in Excel safe mode, disabled all excel add-ins
- Run full virus scan, gone through and closed all the processes on the machine that I can, tested excel after stopping each process
- Run full windows memory diagnostic and no errors reported
- Computer is HP workstation only couple of months old, all latest drivers and updates
- The workstation is running Windows 7 x64 Pro, Trend Micro AV software, part of a SBS 2011 domain.
The other issue I am having on the same machine and reason I ask the question here instead of creating a new thread is because I thought they may be related. We use an Outlook 2013 add-in but on this machine every time we close Outlook the add-in disappears
we actually have to go back in to Outlook each time and re-enable it and it works ok.
I can only think of two options one is complete removal and reinstall of Office which I don't think will fix the issue or complete format/reinstall of Windows which will be very time consuming and would rather not do.
Thanks

Answer 1

Hi,
Thanks a lot for the detailed information you gave, it was very helpful. After read though your post, could you help me on some questions:
For Excel crash:
Questions:
Is this the only workstaion which having this issue?
Is this issue happen on particular spreadsheet?
What is the cpu model of this workstation?
Was this issue starting suddenly? If so what has been changed on the server?
Some steps I would suggest to try:
Clean boot your workstation and try to open the spreadsheet again.
Delete temp files of current user.
Disable hardware graphics acceleration
File: Options: Advanced: Disable hardware graphics acceleration.
Also please collect some information for me and send the information through mail to: [email protected]
Click on the link below.
http://support.microsoft.com/sdp/0B22492D3336343838333834303043
Click on the Run button (recommended) to start the diagnostic process.
Follow the onscreen instructions to run the diagnostic on this computer, or on a different computer.
For Outlook
Questions:
Is this issue only happening on this workstation?
Is the Group Policy set in your domain to control 3^rd party loading behavior?
Does Outlook start up slow? (Sometimes if Outlook start time exceeded threshold, add-in will be disabled)
            Some steps I would suggest to try:
Change registry key under: HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins(name_of_the_addin), set load behavior to 3, which specifies that the add-in is loaded at startup. For more information, see
LoadBehavior Values.
Delete registy key under: HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\outlook\resiliency\disableditems\
Let me know the result, so we can check further, thank you.