Hi My Windows7 PC (64bit) has become infected with trojans/viruses and I need to do a full re-install from scratch. But when I try to boot off the CD/DVD drive it keeps (eventually) going to my hard disk and booting from there. How do I FORCE it to boot from the DVD? I have tried hitting F10 during boot to get the Intel "Boot Menu" but whichever option I select (i.e. either the "ST3500320NS - 500.1GB" or the "TSSTcorp CDDVDDW SH-S223C - ATAPI") ... either way it always still seems to boot off the hard disk ! Obviously this is no good because I might catch a virus from the current installation! - Any thoughts? With thanks Ship P.S. My system: O/S: Windows7 64bit MB: Intel DP55WB MA TX Processor: Intel Core I5 750 2.66GHz HD: Seagate 500Gb, RPM: 7200, Cache:32MB, SATA DVD: DVD-RWSATA P.S. I have tried my damnest to kill off all infections by doing extensive scans with anti-virus software (AVG, Kaspersky) and various anti-valware (e.g. Malwarebytes, SuperAntiSpyware, MSE, Spybot Search& Destroy, etc) - I even tried using booting from rescue CDs (even though most of them failed to run) - anyhow I am HOPING that my data is virus free.