We’ve had this issue on a Windows 2012 Terminal Server. When users click on any type of hyperlink in Outlook (or any other Microsoft product), it gives this error.
This issue is quite interesting. It our case, it has been caused by removing Chrome from the system. But it did not uninstall properly, leaving un-removed registry keys all over the place.
What happens is, when Chrome is installed, it uses a class handler called ChromeHTML. When you click a link, Outlook looks for this class in the registry. If Chrome has not been removed correctly, you will get error above.
The method of fixing this would be to change the .html class under each HKEY_CURRENT_USER, but this is a headache. The better way is to copy htmlfile class, delete the old ChromeHTML class, and reimport htmlfile class as ChromeHTML. This sets ChromeHTML as Internet Explorer, fixing the issue for everyone.
The steps to fix this are as follows:
Delete the ChromeHTML key from HKEY_LOCAL_MACHINESOFTWAREClassesChromeHTML
Export the HKEY_LOCAL_MACHINESOFTWAREClasseshtmlfile key to your desktop, call it reg.reg
Open the reg.reg file in notepad and do a word replace of htmlfile to ChromeHTML
Save the notepad file and exit
Run the registry file which will import the new key
Once users close Outlook and other Microsoft Office programs, the problem will be resolved.
We have a shared environment which we have had issues with lately when customers on slow connections have input lag when using Microsoft Office 2013 applications, specifically, Word.
After much research and testing, we found this issue was to do with Hardware Acceleration that is enabled by default within Office 2013. This is great if you are on a normal desktop/laptop, but not so good on Terminal Server/Remote Desktop Services.
To disable this in word, do the following:
Click File > Options
Scroll down to Display
Tick Disable hardware graphics acceleration
For Group Policy, you need to have the following settings set: