Microsoft recently released an update (KB3013455 (MS15-010)) that was meant to resolve some security issues. Specifically a vulnerability in Micosoft Windows that "could allow remote code execution if an attacker convinces a user to open a specially crafted document or visit an untrusted website that contains embedded TrueType fonts” (Microsoft).
The update had a negative side effect, which was distorting fonts. The easiest way to fix this was to simply uninstall the update. As of now, Microsoft has released a patch for the original update that should fix the issue.
Known issues with this security update
After you install security update 3013455, you may notice some decrease in text quality in certain scenarios. The problem occurs only on systems that are running one of the following operating systems:
- Windows Vista SP2
- Windows Server 2008 SP2
- Windows Server 2003 SP2
To resolve this issue, install update 3037639. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
3037639 Fix for text quality degradation after security update 3013455 (MS15-010) is installed
For now, we recommend installing the most recent patch, which seems to be fixing the issue.