Today i got an error when tried to access the vCenter web client. The error log is pretty simple, just need to install flash player since it prerequisite to open the web client.
So, i tried to download the source from here http://www.adobe.com/go/getflashplayer but seems this only available for online mode whereas my server does not have an internet connection due to security restriction. I went to unofficial download page and download the offline installer.
But, again in the end.. i could not install the flash player either with compatibility version problem or because one of the reason.
There is no other way around until i posted the problem to Microsoft Support and they gave an basic instruction: Install Desktop Experience!
You can find this feature along with User Interfaces and Infrastructure.
Just select the option and please take note reboot might be required post installation.
After reboot process you can check now you able to login into web client normally.