Not all security software is created equal. In fact, the tools that would normally protect your computer can turn against you if one line of code is out of place.
If you have Panda Security anti-virus software installed on your computer, look out, because your last virus scan may have bricked your PC. A mistake may have flagged files on your computer as malicious.
The files that it flagged were so not malicious; in fact, your computer needs them to power on. Panda Security only learned that its anti-virus software was bricking computers after users reported that their computers were getting stuck in a restart loop.
If you've run a security scan with Panda Security recently but haven't restarted your computer, don't restart it!