Incompatibility of several applications after installing Windows 8.1

Microsoft has published a list of apps that could be blocked, disabled, or have their behavior changed after installing Windows 8.1. There are several posts on the company's forums from disgruntled customers reporting compatibility issues.

The long list includes popular security applications such as ZoneAlarm, McAfee antivirus, Trend Micro Titanium, Panda Security, Outpost Antivirus Pro 8, and even Visual Studio 2012.
Here is the list:

1. SuperNova up to 12.51
2. Searchqu Toolbar
3. ZoneAlarm 2013
4. Expression Studio 4 Ultimate 4
5. McAfee AV Products 2013
6. Trend Micro Titanium 2013 for NTT
7. Panda Security up to 2014
8. Outpost Antivirus Pro 8
9. Outpost Security Suite Pro 8
10. Visual Studio 2012

For this reason, the company has released a compatibility update for Windows 8.1 and Windows Server 2012 R2