VMware Player - Failure reserving memory

Hello everybody,
while using VMware Player we observed the following Problem:

Suddenly while using VMware Player we got the following failure-message (see attached screenshot):
Failure while VMware Player
We made sure the Virtual Machine got enough ressources. After the failre appeared it is necessary to restart the host-computer to make the virtual machine work again. The failure happens under Windows XP and Windows 7.

The failure happens since the host-Computer changed on to a dell latitude Notebook.

Maybe somebody has an idea?

Best regards
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And how much RAM you have on the host?
SystemadministrationAuthor Commented:
4GB. The virtual machines get 1 GB assigned. This should be enought for a standard-xp or windows7-installation.
Windows 7 requires 2GB (Host or guest alike)
SystemadministrationAuthor Commented:
Allright. We could try to rise the Memory up to 2 GB for the windows7-vm.
But what about the xp-virtual machine?

Furthermore the employee told me this virtual machines seemed to run on his old host.
After the migrated to a new Dell-Notebook with similar ressources the Problems started.
Vmware does not state reasons past obvious that host needs more memory or vms have to be assigned less:
Try to stop all programs running and then start VMs, if not chop some memory from gusets and try again (i think it has same minimum/maximum recommended arrows like vsphere)

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