Hello, I have just installed a copy of Windows 7 RTM Ultimate on my Asus A8Jr laptop with a modded BIOS (SLIC 2.1, DELL). I have installed the Dell.xrm-ms and inputed the OEM SLP Key that starts with 22TKD.... I restarted the computer and says "30 days to activate. Activate Windows now." in Computer Properties. When I use slmgr.vbs -ato in cmd, it gives: Error: Product Activation failed. Please help me!