Hello friends, I have the system with following configuration. Make:custom built RAM: 224MB (left) HDD:80GB OS currently installed: XP sp2 Now, I want to install virtual PC with Vista. I tried downloading twice and went through settings for memory allocation and I get error 'not enough RAM' even I allocate 150MB. Is this because I am trying to install Vista? At last, I tried 111MB allocation and it didnt gave me any error. But this time it went to DOS and then asked me to put in disc for boot process. I inserted floppy but still keeps on asking me for 'Insert System Disc' Now I dont know what I should do to get this working? Can someone help me with this installation? Need your help..!! Networkid "Try more achieve more"

RAM: 224MB (left) It's meaningless. How much RAM is actually installed in this PC? i_XpUser

Also... is the version of Virtual PC compliant/OK for an installation of Vista? Do you actually know how much RAM it will require to run with Vista within V-PC? Each OS requires a different amount of RAM to run within V-PC; and the more recent the M$ OS the more RAM required... Incidentally is a Celeron capable of running Vista in any style of installation?

XPUser RAM on my PC is 256MB trvlr I am trying to download V-PC from MS site and it gave me options of which V-PC you want to install? XP and Vista were options among them.. Networkid "Try more achieve more"

My mistake..I thought had 512MB RAM. But Vista enterprise requires 512MB itself.. so unfortunately cant install this time.. XPUser and trvlr thanks for help.. Networkid "Try more achieve more"

You're welcome. BTW the 512MB RAM for Vista Enterprise is a joke. The optimal RAM is at least 2GB. i_XpUser