While I see no particular reason why you couldn't, the vast difference in hardware requirements and supported devices make finding a system that would both run Windows 95 to a useful extent and provide acceptable performance for Windows Vista extremely difficult. For instance, Windows 95 has sever problems with larger amounts of RAM, and probably won't boot with more than 490 MB installed (you can work around it after Windows 95 is installed.) Few graphics cards support both Windows 95 and Windows Vista (the GeForce 6 series is the only exception I can think of). USB support is only found in certain versions of Windows 95, and none at all for USB 2.0. Windows 95 doesn't support SATA controllers. Most wireless cards won't work. And so on, and so on...
Bottom line: if you absolutely must run Windows 95, do it in a virtual machine.
Yes - especially through the use of virtual machine technology. Otherwise, you can configure the laptop as a dual-boot machine.
You cannot run OS X on a windows machine.
They are "compatible" in the sense that many applications that run on Windows XP will run on Windows Vista.
Vista is just a version of Windows; the version after Windows XP and before Windows 7. If a machine is Vista-ready or Vista-compatible, it just means that the hardware and available drivers are compatible with Windows Vista. You might be able to run that PC on Windows 7 or 8, but it depends, and you would have to check with the manufacturer to find out what all it is compatible with.
Many applications and games written for or compatible with Windows 98 will run on Windows Vista.
Yes ofcourse, Windows Vista is upgraded version of Windows XP. Obviously it can run Windows XP applications.
Windows Vista
Yes. Generally speaking, any game that will run in Vista should run in Windows 7. At their core, they're the same OS.
Windows Vista can already run most XP applications, with no need for any additional software.
your computer might not be powerful enough to run vista. but to be honest i hate vista, get windows 7. Are there any applications running?
open CD drive insert windows vista disk and run it
You should buy an upgrade version of Windows Vista however your computer if running XP is likely not to be powerful enough to run windows vista. You should run Microsoft Windows Vista Upgrade Advisor before upgrading as this will show you any problems your computer may have running Vista.