Linux vs Windows based DVR, which to choose?

There were some video quality and security issues raised on which platform is better for DVRs, especially those utilizing web view functionality. I am currently using a Linux system but I don't know if viruses is indeed an issue in Windows based DVRs. Does it have anything to do with the video quality at all?

I stumbled across a blog on the issue, your comments will be most appreciated:

The DVRs in the Security Market today have been divided into 2 major Groups; the Linux-Based DVRs and the Windows-Based DVRs. Each kind has both pros and cons. One has greater advantage over the other for specific applications. To help the readers better understand the significant differences between the two and which is more appropriate to use for a desired function, please share your knowledge on how you determine one as more advantageous and more efficient compared to the other. Your comments will be very much appreciated.