I switched the switch ( :rolleyes:) to the OFF position by unscrewing 2 side screws and removing the power and data links for the HDD cage. Then, with a screwdriver, but not with ease, i switched the 9th switch.
After this step, i went to BIOS and DISABLED the option PCI Express 64-bit BAR Support from the Service Menu (Ctrl+A)
Xen Server 6.1 - xen tools installation problem
Windows Server 2008R2 で SQL Serverとかを使っているVMのPVドライバ(xs-tools)の更新って
Once you log in, run msconfig, choose "Selective startup", then go to Services tab, hide all Microsoft and disable all but XenTools. Next, show all services and disable Microsoft SQL. Do the same on the startup tab. Reboot and hopefully this will allow you to proceed. If you have any antivirus, you will want to uninstall it as it probably has a network filter driver, so stopping AV services is not enough.