Viruses, mineral deficiency, and PH problems can be hard to pinpoint. If you don't have that plant planted in brand new fresh soil where you are confident that the PH is 7.0 that would be the first place to start. Lowes/home depot and may garden centers sell for under $10 a PH meter . Green box meter head and a long metal rod that extends from it. Take a damp soil meter reading. If the PH is not 7.0 you could be looking at mineral deficiencies in your plant caused by its inability to absorb them due to the PH imbalance. You can always adjust the PH by adding garden lime or sulfur. If this is just one potted plant you are dealing with. Go buy new soil and repot....if you start to see this occurring in several plants check you PH levels...the $10 investment in a PH reader can save you hundreds of hours of dread and many days of disappointment.

The problem with a little new knowledge- I never noticed and worried about things like that before- thanks again for the reassurance! Now off to research transitional colors, viridescence and univittata (which I first read as "uninvited" LOL

I would guess the infections are happening due to not updating the pc fully, right now it is essential to keep adobe updated, java,& flash too because there are known in the wild infections for those vulnerabilities. The one for adobe is very serious. Using the secunia tool to find if you have anything that needs updated is an essential part of your security these days. Plus the recent out of band critical update issued by Microsoft is a must have. Secunia Online Software Inspector (OSI) these are serious infections and can not be cleaned properly with out the assistance of the security forum community for the average user. Trying to do it alone with out specific guidance is only going to clean parts of it. And using anything that says it will clean something is generally a sure bet that the product you are getting is in itself more malware if it was not recommended by a security forum assistant.

One thing you can do now is run the Microsoft Windows Malicious Software Removal Tool. click Start/Run/ type> MRT and do a scan. Win32/Spybot is listed as one that will be removed. Yes, you can delete that file if it will let you. Sometimes worms are set to reinstall from the registry and return. You may have to turn off system restore and run your symantec scan in safe-mode.