Thats good. Now you are in BIOS menu right ?
Now Are you able to see a Option called BOOT ?
refer this link
here, refer the "Changing Boot Sequence for the Current Boot"
Its mentioned that , You can change the BOOT menu when you restart your system. when you restarts, click on the F12 key, which will give you a boot menu. select the CD Drive from the list, so that your system will Boot from the CD. if this doesnt work, then enter into BIOS and Goto the "BOOT Options" and change the Boot menu order.
now when your system booted from the CD , just do these steps
1.(I think you will get the menu when you boot from the CD )
2. Enter recovery console.
3. at the command prompt go to
4. next type:
copy userinit.exe wsaupdater.exe
5. exit and reboot normally. You should now be able to logon. But you're not done yet!
6. run regedit( Goto Start-> Run -> Type regedit and click OK )
7. find the Userinit key in:
8. modify the entry:
so that it reads:
I hope this will help you to solve the issue