If for now, just in a concept stage, Crossover, as was named, is a virus sent by a anonymous source to Mobile Antivirus Researchers Association. Crossover, if it will remain in this form, is for sure a threat to both PCs and PDAs.

“Crossover is the first malware to be able to infect both a Windows desktop computer as well as a PDA running Windows Mobile for Pocket PC”

Let’s see why this virus is so dangerous. Let’s say that it is installed on the PC. When the user of this PC tries to use his PDA on the PC, the virus uses Microsoft’s ActiveSync, the software used for the transfer of files between PC and PDA, and it jumps on the PDA, without even a single problem. If the virus is installed on a PDA, the virus will delete all the files in the “My Documents”, since it’s one of the most utilized directories, excepting Windows directory and Program Files.

After deleting My Documents and sometimes leaving the user without his documents that he was working for a long time, he makes copies of himself and also moves one of his copies in the startup. So, the PC will work slower and slower till it will crash.

The good news it that Mobile Antivirus Researchers Association said it will make further analysis on the virus and also it will send copies of the virus to all important antivirus companies.

Let’s hope that this things will happen when we are prepared, and also let this be a lesson for everyone to use an antivirus software.