Inti

I have a new Fujitsu-Siemens PC with Windows Vista Home Premium.

Sometimes, when I right-click any item (folder or file) in Windows explorer,
the context menu doesn't appear or has less options than usual. I have to
close some windows (IE, Windows Mail, Windows Explorer...) to get the context
menu working again. But, a few minutes later, it doesn't work again, and I
have to close more windows... until I have no windows to close. Then, I have
to reboot.

This has happened to me many times. I've reinstalled Windows Vista but it
started to happen again.

Can anyone help?
Thanks