I think I have a virus. I found a "Letter" from "jhonny appleseed" to "Kate" and I also found strings code and other strange looking files. I tried to delete a number of these files but they won't delete the just reappear. I dont know if this is related but I also cant open chrome beacuse it keeps crashing and firefox wont load any pages.
There are no viruses that affect OS X *yet.* What you probably have is malware. Suggest that you download Malwarebytes Anti-Malware for Mac
Also check out the following KB Article: http://support.apple.com/en-us/HT6506
If still having problems:
CLICKY CLICK---> EtreCheck & copy/paste your report. ”EtreCheck is a simple little app to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac.”
The letter to Kate is a text sample, nothing to do with malware. It appeared in one of Apple's Think Different ad campaigns a few years ago.
Plenty of OS X files either can't be deleted (system files) or get recreated almost immediately (caches). The most common reason for the browser issues you describe is not 'viruses' but third-party utilities that claim to clean or protect your Mac. In fact, they do neither and are typically harmful.
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