no sorry it is not possible as the previous version will be over written by the newer version you upload, invest in a hard drive that way you can save one on the hard drive and the other on computer!
Yes.
No, you can create multiple accounts on most of the OS's
Yes, you can order the multiple set of Vista CD's from Microsoft after you purchased the Vista DVD, Windows vista comes on a single DVD and one recommended hardware requirements for Vista it's a DVD Drive.
Not on Windows XP or Vista.
Lowe's will instal single hung windows. The prices vary, but they are generally comparable to other installation services. The prices are decent, although you may be able to find better by looking around.
If you are talking of DOS OS, no it is not possible as DOS is a single user, single tasking OS but if you are talking of Windows then yes you can open multiple DOS windows and do different work.. But please remember that this is the properties of Windows, not DOS..
You can use a software called DOSboxAnother Answer:Turbo C++ was discontinued in 2009 by Embarcadero Technologies. While you might be able to get it to run in Windows 7 using compatibility mode, it would be better to upgrade to C++Builder.You can use DOSBox to install Turbo C in Windows 7. Or Turbo C Simulator which install Turbo C in Windows 7 in a single click.
Fat 32
Yes you can. All the information on the CD works the same on all computers. The only thing that will change is the serial number. Each serial number has to be registered to only one computer. One setup CD will install as many times as you need although you must purchase a new key for each install.
Yes. You can get the demo FL Studio from Image Line as a single application to install on any computer and you can transfer the installer application to another computer. Even if you already have it installed, you can run the setup again and it will still install even in another location and neither will interfere with the other despite the fact 2 versions are installed.
No version of Windows actively requires you to "register." They do require you to "validate"; that is, check to see if your product key is valid. OEM copies, such as those found on computers purchased from Dell or HP, and products activated with a volume license key (a single key for businesses to install on multiple computers) do not require the additional online validation step.
2 i think