Well, the RSOD is like the BSOD (same thing) but is impossible to treat. It says it is possible with Microsoft System Recovery but it has never worked. If you ever got the RSOD you probably got technical support to fix it.
The RSOD (Red Screen of Death) will be shown when there has been a boot loader error in Windows Vista. There are several possible causes for this and if you are uncomfortable trying to solve your own computer problems, you should bring it to a repair shop; some of the possible solutions can further damage your computer if done incorrectly.