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First, please confirm you are using Virtual PC - and not Client Hyper-V.<br />
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What is the error message when you attempt to launch the VM?
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First, please confirm you are using Virtual PC - and not Client Hyper-V.

What is the error message when you attempt to launch the VM?

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I resolved the issue myself
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I shut down a number of services on my host in order to give more ram to my VM machine (Microsoft Virtual PC) I must of disabled one of them because on reboot I cant launch my vm. Any idea what services it uses?
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I shut down a number of services on my host in order to give more ram to my VM machine (Microsoft Virtual PC) I must of disabled one of them because on reboot I cant launch my vm. Any idea what services it uses?

what services are required for microsoft virtual pc

Microsoft Virtual Server was a virtualization solution that facilitated the creation of virtual machines on the Windows XP, Windows Vista and Windows Server 2003 operating systems. Virtual machines are created and managed through a web-based interface that relies on Internet Information Services (IIS) or through a Windows client application tool called VMRCplus. Features included Linux guest operating system support, Virtual Disk Precompactor, symmetric multiprocessing (SMP), x64 host operating system support, the ability to mount virtual hard drives on the host machine and additional operating systems support, including Windows Vista, and a volume shadow copy writer.

Microsoft Virtual Server

The Microsoft Legacy Operating System topic includes legacy versions of Microsoft operating systems prior to Windows 2000: All versions of MS-DOS and other versions developed for specific manufacturers and Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions, and Windows Mobile.

Microsoft Legacy OS

Virtualization is the act of creating a virtual (rather than actual) version of something, including (but not limited to) a virtual computer hardware platform, operating system (OS), storage device, or computer network resources. Virtualization is usually the creation of a system that executes separate from the underlying hardware resources, or the creation of an entire desktop for systems located elsewhere, similar to thin clients.